Parsons Corporation

History

Parsons was founded by Ralph M. Parsons in 1944. Emerging at the end of World War II, Parsons' location in Los Angeles, proximity to organizations such as the Naval Air and Missile Test Center, Air Force Western Development Division (WDD) and Space and Missile Systems Organization (SAMSO), and partnership with Aerojet Engineering, enabled it acquire early developmental projects including electronics, instrumentation, ground checkout systems design, and engineering for aircraft, missiles and rocket facilities.

In the early 1950s, Parsons efforts in oil and petrochemical process plants came into focus with design/build efforts supporting both Shell and Gulf Oil in Texas. Parsons delivered systems that would also recover sulfur products for later use in industrial processes. Facilities came on line in 1952.

In 1961, Parsons founded the Ralph M. Parsons Foundation. The foundation became entirely independent from the company in 1974. Also in 1974, Parsons opened the first part of its headquarters in Pasadena.

In 1985, Parsons finalized an Employee Stock Ownership Program (ESOP), allocating shares in proportion to employees’ salaries. The ESOP program continues today.

Parsons interest in bridge projects grew through the 1980s, 1990s, and 2000s leveraging credentials enabled by acquisition of firms including DeLeuw, Cather, and Company in 1977 and Steinman, Boynton, Gronquist and Birdsall (SBGB) in 1988. These acquisitions brought experience and pedigree for design and/or refurbishment of iconic bridge structures including the Mackinac Bridge (Steinman, 1957), Tagus River Bridge, and Brooklyn Bridge. Parsons continues to provide inspection, maintenance, and upgrades for these bridges to this day. The company has also secured numerous design, design-build, and/or construction management jobs delivering new bridges such as the Tacoma Narrows Bridge (2007), John James Audubon Bridge, Windsor-Detroit (Gordie Howe) Bridge, and the Don Welge Memorial Bridge.

In April 1996, Parsons CEO at the time, Leonard Pieroni, was killed in a U.S. Air Force plane crash in the Balkans along with U.S. Commerce Secretary Ron Brown.

In October 2004, Parsons sold its hydrocarbons focused business, Parsons E&C Inc, to Australian firm Worley.

In 2012, Parsons developed the logistics strategy for movement of the Space Shuttle Endeavour from Los Angeles International Airport to the California Science Center near downtown. The effort was completed at no cost to NASA or the science center and was delivered by a team of local consultants that contributed expertise and resources for the effort.{{cite news|title=Parsons crafted logistics plans for Endeavour's journey

In late February 2019, Parsons announced the move of its headquarters from Pasadena, California to Centreville, Virginia.

On May 8, 2019, Parsons executed an Initial Public Offering of approximately $500 million on the New York Stock Exchange under the symbol PSN. When the transaction was conducted, Parsons returned to public status after leaving 35 years before to become a private, employed-owned company.

On September 1, 2023, Parsons announced the move of its headquarters to Chantilly, VA.

Discussing the company's business outlook in February 2024, CEO Carey Smith stated that the company believes it will continue to see strong demand for its solutions, including cyber, electronic warfare, signals collection, space, missile defense and critical Infrastructure protection given world-wide geopolitical outlook.

In 2025, Parsons Corporation pledged a $2.5 million donation to Donald Trump's demolition of the East Wing of the White House and construction of a White House State Ballroom. The New York Times reported on this donation, noting that the donation came at the same that the Parsons Corporation was jockeying for Trump administration contracts valued for more than $1 trillion.

Project timeline

1940s

Less than 2 months after Parsons was founded, they were hired to provide turnkey engineering, management, and oil well drilling services to the great divide in Colorado, United States.

In 1948, Parsons began work to develop naval missile facilities at Point Mugu Missile facility. Also in 1948, the Atomic Energy Commission created the Idaho National Engineering Laboratory reactor so that it could conduct advanced nuclear experiments with civilian and military reactors. Parsons designed all facilities for test and support operations—including the largest cast-in-place concrete arch ever poured, a span of 3,000 feet.

1950s

In 1952, the U.S. Army awarded Parsons a multi-year design and construction contract role for numerous laboratory and test facilities at the Redstone Arsenal in Huntsville, Alabama.

In January 1953, Parsons began work on the construction of Turkey's first oil refinery near Batman, Turkey.

Between 1957 and 1960, Parsons designed Port Arguello Launch Complex 1 under contract to the U.S. Navy to support the launch of MIDAS and SAMOS programs using Atlas missiles. The facility was renamed Launch Complex 3 when the Air Force assumed control of the base from the Navy.{{cite book|last=Spires|first=David|title=Assured Access, A History of the United States Air Force Space Launch Enterprise, 1945–2020

In 1958, Parsons began fabrication of electronics and instrumentation including miss-distance indicators for the Pershing Medium Range Ballistic Missile. In June 1959, Parsons was awarded a contract for Titan ICBM facility design to be constructed near Moses Lake Washington.

1960s

In 1961, Parsons designed the installation plans for each of the 1,000 Minuteman intercontinental ballistic missiles, which were used by the U.S. Air Force during the Cold War. In 1964, Ralph M. Parsons managed the design of the U.S. Treasury Philadelphia Mint expansion. Parsons created all construction and equipment specifications, oversaw construction, and prepared operations and maintenance manuals.

In 1962, Parsons commenced design efforts as civil architect-engineer for the Titan III Integrate, Transfer, and Launch (ITL) launch complex at Cape Canaveral Air Force Station. Upon completion, the complex became known as Launch Complex 40 and Launch Complex 41. Features of the ITL design included the Vertical Integration Building (VIB) and Solid Rocket Motor Assembly Building (SMAB). The complex supported its first launch in June 1965.

In February 1963, Parsons was contracted to design the Apollo Spacecraft Propulsion System Development Facility at White Sands New Mexico. In 1964, Parsons created a technical and economic blueprint for the North American Water and Power Alliance (NAWAPA), specifically in the United States, Canada and Mexico. The plan outlined concepts to build an integrated system of dams, channels, tunnels, reservoirs, hydroelectric plants, and pumping stations. The plan ultimately did not move forward due to environmental concerns and cost. In 1966, Parsons has served as general engineering consultant for the DC Washington Metro in Washington, D.C., which is a $11 billion, 103-mile rapid transit rail system connecting Washington, D.C., to its many suburbs.

In 1968, Parsons designed and constructed the entire Honolulu Airport in Honolulu, Hawaii (which is now referred to as the Daniel K. Inouye International Airport), including a 12,000-foot runway on an offshore reef to minimize noise in Honolulu. The runway is still used today. In 1968, Parsons began work to upgrade the Federal Aviation Administration (FAA) by providing plans, specifications, and standards to upgrade air traffic controls in 19 facilities. Today, Parsons provides 24/7/365 technical support services in all nine FAA regions and two specialized FAA centers. Again in 2001, Parsons was the prime contractor to implement modernization plans for the national airspace system.

1970s

In 1970, Parsons was hired by BP and ExxonMobil to perform engineering studies in Alaska to determine if the company could overcome the technical and logistical engineering challenges in Arctic oil production. In 1971, Parsons and Union Oil Co. of California demonstrated an improved sulfur recovery process at Union's Los Angeles pilot refinery plant. Based on the proven capacity to extract over 99% of the sulfur contained in the waste gases, the company was contracted to construct a full scale plant to harvest sulfur for industrial uses and reduce pollution.

Following arctic oil production study, Parsons was hired in 1974 as managing contractor for all oil and gas facilities for BP and Exxon's east side portion of Prudhoe Bay, Alaska. Also in 1974, Parsons provided modernization and construction program services for the new construction on more than 100 major U.S. postal installations.{{cite news|date=December 5, 1973|title=Contract Awards|work=The New York Times |url=https://www.nytimes.com/1973/12/05/archives/contract-awards.html?searchResultPosition=29 |access-date=May 13, 2024}} Parsons continues to provide services for the USPS today.{{cite news|title=Three win $252M Postal Service program management contract |author=Mark Hoover

In 1975, Parsons was selected to transform Yanbu, Red Sea in Saudi Arabia into a thriving, modern port complex. The company provided the master plan, design, and construction management services for this self-contained industrial city of more that 100,000 people that produces oil, gas, and petrochemical products used worldwide. Continuing work in the middle east, Parsons won a contract to design, engineer, and manage the construction of multiple facilities for ARAMCO's Saudi Arabian gas program.

In October 1976, the Federal Railroad Administration awarded Parsons, as part of a joint venture, the Northeast Corridor Improvement Program contract, which was to provide a 456-mile, high-speed rail service between Boston, New York, and Washington, D.C. In 1977, Parsons completed a 4-year design-build turnkey program to build the Jeddah Airport in Saudi Arabia (also known as the King Abdulaziz International Airport).

In 1978, Parsons developed facilities criteria for assembly, testing, and system support of the U.S. Air Force's MX missile system at Vandenberg Space Force Base. In addition, as a subcontractor to Martin Marietta, Parsons supported development of the Space Shuttle ground system at Vandenberg.{{cite news|title=Shuttle Contract Awarded |publisher=Santa Maria Times|date=July 14, 1978

1980s

In 1980, Los Angeles selected a Parsons joint venture to provide the Hyperion Wastewater Treatment Plant with program management, advanced planning, conceptual/detailed design, construction management, and startup services on all of their solids- and gas-handling expansion projects.{{cite news |title=Innovative plan taking shape at Hyperion |date=April 12, 1984|author=Judy Brill |publisher=The Argonaut

In 1985, the Los Angeles Metropolitan Transportation Authority hired a Parsons joint venture to provide commuter rail services and construction management of what would become the MTA's Red Line. Also in 1985, the U.S. Army Corps of Engineers selected Parsons to furnish design, systems integration, engineering, and procurement for the eight chemical weapons incineration plants throughout the continental United States. In 1986, Parsons designed, engineered, and managed construction of the Red Dog mine air and sea ports along with the entire complex.

In 1987, Parsons engineered, designed and delivered the Titan solid booster rocket test stand at Edwards Air Force Base in California. The test stand facility was originally designed by Parsons in the early 1960s to support Saturn V engine testing. Parsons rebuilt the facility again after a 1991 test failure of a Titan IV SRMU motor that caused significant facility damage.

In 1988, Parsons was hired to expand the Dulles (IAD) and Ronald Reagan (DCA) airports. Parsons also continued to oversee rehabilitation of the Brooklyn Bridge that had been started by bridge firm Steinman, Boynton, Gronquist, and Birdsall which had been acquired by Parsons that year.

1990s

In 1992, the Port of Los Angeles selected Parsons to design the Pier 300 $60 million dry bulk terminal for international commodities such as coal and petroleum coke. Also in 1992, Parsons provided engineering cleanup services to the Department of Energy for its uranium enrichment facilities in Ohio. The project was worth $125 million. In 1993, The Southern Nevada Water Authority selected Parsons as PM/CM for their $2 billion capital improvement program to increase water capacity for the Las Vegas Valley. The company continues to provide program and construction management services to SNWA most recently being awarded $150M contract in July 2023.

In 1995, Parsons designed, engineered and managed infrastructure elements of the National Ignition Facility's (NIF) construction. This facility houses the world's most powerful laser. Additionally in 1995, Parsons paid the U.S. $3.2 million to settle fraud claims, the settlement comes from allegations that Parsons knowingly overbilled the government on two Air Force contracts.

In 1996, Parsons was awarded a contract by the USAID to reconstruct Bosnia-Herzegovina, in the Balkans, after the war. In 1997, Parsons began the structural rehabilitation and catenary designs that incorporated electrifying the railroad tracks of the Tagus River Bridge (also known as the 25 de Abril Bridge) in Lisbon, Portugal.{{cite journal|title=Bridge within a bridge|author1= Gesner, George A.|author2=Jardim, José

In 1998, Parsons was hired by the U.S. Navy to manage UXO removal in Hawaii. The unexploded ordinances had accumulated in the island of Kaho`olawe. In 1999, Parsons completed the design for the New Baiyun Airport (now called the Guangzhou Baiyun International Airport) in Guangzhou, China. Also in 1999, Parsons was selected to design the Woodrow Wilson Bridge.

2000s

On September 19, 2002, Parsons was awarded a contract to design, build commission and operate the Savannah River Salt Waste Processing Facility (SWPF) in South Carolina by the department of energy. In 2020, the company completed all steps to begin the treatment of radioactive waste at the facility.{{cite web|title=DOE Approves Start of Salt Waste Processing Facility at Savannah River Site

On October 8, 2002, Parsons proceeded on the Tacoma Narrows Bridge, a design-build project, originally scheduled to be constructed in 55 months. The bridge was completed and opened in 2007.

In June 2003, a joint-venture team led by Bechtel National, Inc. and Parsons Corporation was selected to destroy chemical weapons at the Bluegrass Army Depot in Kentucky. The final munition was destroyed in July 2023.

In 2004, Parsons served as project manager to cleanup and restore Onondaga Lake in New York.

The same year, a $29.5 million contract was given to both Parsons and Gilbert Southern/Massman Construction to redo a portion of the Escambia Bay Bridge near Pensacola, FL after Hurricane Ivan made landfall and knocked off 58 spans of the original bridge and misaligned 66 other spans. Traffic destined for the bridge was rerouted onto US 90 (exit 17 on I-10) for 2 months while construction was taking place, which caused severe traffic jams. The westbound bridge opened to traffic on October 4, six days ahead of schedule, while the eastbound lanes opened to traffic on November 20, 66 days after Ivan made landfall and 27 days ahead of schedule. Both contractors received $1.5 million in bonuses for the early completion.

In March 2004, Parsons was awarded a contract for a $243 million project to build 150 healthcare centers in Iraq. This contract generated controversy when the US Army Corps of Engineers terminated it, alleging Parsons' failure to perform and reassigning much of the remaining work to other contractors.

In 2005, a Parsons led joint venture constructed the north terminal of the Miami International Airport. The same joint venture (Parsons-Odebrecht) was awarded another contract for the airport to improve the baggage handling system.

In 2006, in a joint-venture, Parsons provided the design review and program/construction supervision for the construction of the Dubai Metro.

2010s

In 2010, Parsons, in a joint-venture, completed the $575 million, LEED-silver-certified Tom Bradley International Terminal Improvements and Baggage Screening Systems Project at Los Angeles International Airport. Parsons was the construction manager for this project. Parsons was also a part of the terminals update in 2006. The company also played a role in post 9/11 Pentagon rebuilding efforts, providing program and construction management services.

In 2011, in a joint-venture, Parsons completed construction on the John James Audubon Bridge in Mississippi. The John James Audubon Bridge is the longest cable-stayed bridge in the Western Hemisphere and is also the first Design-Build project undertaken by the Louisiana Department of Transportation and Development. On November 8, 2012, the bridge was awarded the Design-Build Institute of America (DBIA) 2012 Design Excellence Award.

In 2013, Parsons designed and managed construction for the earthworks, roads and water and wastewater in Saadiyat Island, Abu Dhabi, UAE.

In October 2014, Parsons was awarded a contract by Tecon Investments to oversee major elements of the Dubai Design District (D3).

In April 2016, Parsons received a construction management contract from the Architect of the Capitol to support the restoration, maintenance and renovation of federal structures on the Capitol campus.

In 2016, construction was completed for the World Trade Center Port Authority Trans-Hudson Transportation Hub (PATH). Parsons was responsible for the infrastructure group design of the project, as well as supervising the civil, geo-technical and environmental design of the project. It also oversees the installation of the project's communication and safety systems.

On June 12, 2017, Parsons accepted the award for the Operational Efficiency Project of the Year from the California Transportation Foundation (CTF) for their Intelligent Transportation System work on the I-80 Smart Corridor Project.

In 2017, Parsons worked with Abu Dhabi Airports Company as program manager for the Abu Dhabi International Airport expansion.

In April 2018, Leidos selected Parsons for the lead construction role to revitalize the US Antarctic research base at McMurdo Sound, Antarctica in support of the National Science Foundation US Antarctic Program. In December 2019, it was announced that Parsons and Leidos Holdings Inc. had earned spots on a $4 billion contract to support the cleanup of a former nuclear weapons site in southern Washington state.

2020s

In May 2020, Parsons was awarded the $61 million owner's engineer contract supporting construction of the new Windsor-Detroit (Gordie Howe) Bridge In September of the same year, Parsons was awarded the Recovery of Airbase Denied by Ordnance (RADBO) contract by the Air Force. The contract calls for production and delivery of armored vehicles equipped to clear mines or unexploded ordnance from airfields using three-kilowatt ZEUS laser weapon.

In December 2020, Parsons was awarded a four-year, $37 million competitively awarded contract by Naval Facilities Engineering Command Southwest (NAVFAC SW) to support rebuilding efforts at Naval Air Weapons Station China Lake.

In May 2021, Parsons secured a contract with $185 million ceiling to deliver Integrated Solutions for Situational Awareness (ISSA) for Space Systems Command In July, Parsons was awarded a seven-year contract from the Missile Defense Agency to continue work on the TEAMs Next contract to support the development of defense systems.

In June 2022, the Defense Health Agency awarded Parsons a spot on a potential $10 billion multi-award contract for military medical research and development support.

In 2023, Parsons was confirmed as the delivery partner for The Line at NEOM, a 170 km linear city being built in Saudi Arabia.

On July 7, 2023, U.S. officials announced that the final munition in the nation's obsolete stockpile of chemical weapons at the Blue Grass Chemical Agent Plant has been safely destroyed by Bechtel National, Inc. and Parsons. The team used neutralization and explosive destruction to eliminate the munition.

In March 2024, the National Nuclear Security Administration awarded a contract to Parsons Government Services and SeaTech Global Security Solutions to counter the smuggling of nuclear technology on a global basis. The contract has a combined award value of up to $1 billion. Also in March, the National Oceanic and Atmospheric Administration Office of Space Commerce selected Parsons Corporation to develop key elements of its civil space traffic coordination system called the Traffic Coordination System for Space, or TraCSS. The systems integration contract has a period of performance of 2-years and a potential value of $27 million.{{cite news

In April 2024, Parsons secured a position on a $464 million contract with the United States Army Environmental Command (USAEC) for services involving hazardous waste, including perfluoroalkyl and polyfluoroalkyl substances (PFAS).

In June 2025, Parsons announced a partnership with IBM in pursuit of opportunities stemming from the Federal Aviation Administration's plans to update and modernize the United States air traffic control system.

Management

Carey Smith serves as Chairwoman, President, and CEO of Parsons. Matt Oflios serves as the CFO. Parsons operates in two business segments: Federal Solutions and Critical Infrastructure. Additionally the company performs international work especially in the Middle East in countries such as Saudi Arabia.

The board of directors consists of 11 members. As of March 2023, members include:

• Carey Smith: Chairwoman, President, And Chief Executive Officer
• George Ball, Former Chief Financial Officer Of Parsons Corporation
• Mark K. Holdsworth, Founder And Managing Partner Of The Holdsworth Group
• Steven F. Leer, Former Executive Chairman Of The Board Of Directors Of Arch Coal, Inc.
• Ellen Lord, Former Under Secretary Of Defense For Acquisition And Sustainment For The U.S. Department Of Defense
• Letitia A. Long, Former Director Of The National Geospatial-Intelligence Agency (NGA)
• Darren W. McDew, General USAF (ret), Retired U.S. Air Force General
• Harry T. McMahon, Former Executive Vice Chairman Of Bank of America Merrill Lynch
• M. Christian Mitchell, Former National Managing Partner Of Deloitte
• Suzanne M. “Zan” Vautrinot, Major General USAF (ret), President Of Kilovolt Consulting, Inc.
• David C. Wajsgras, Former President Of The Intelligence, Information And Services (IIS) Business (Raytheon)

Acquisitions

Companies acquired by Parsons listed by date of acquisition (incomplete list). Information is current as of May 2024.

• 1944, Ralph M. Parsons Company formed
• Jun 1961, Anaconda-Jurden Associates, Inc.
• Jun 1966, Vitro Engineering
• Jun 1971, Dillingham Engineering Pty. Ltd.
• ** Sep 1977**, S.I.P., Inc.
• Oct 1977, DeLeuw, Cather and Company
• May 1981, Engineering Science, Inc.
• Mar 1985, C.T. Main Corporation
• 1988, Steinman, Boynton, Gronquist & Birdsall
• Mar 1995, Gilbert-Commonwealth, Inc.
• May 2005, Alaris Group
• Jun 2006, 3D/International
• Mar 2009, McMunn Associates
• Nov 2011, Sparta, Inc
• Apr 2014, Delcan, Inc.
• ** May 2014**, Secure Mission Solutions
• ** Nov 2017**, Williams Electric
• ** May 2018**, Polaris Alpha
• ** Jan 2019**, OG Systems
• ** Jul 2019**, QRC Technologies
• ** Oct 2020**, Braxton Science & Technology Group
• ** Jun 2021**, Blackhorse Solutions
• ** Jul 2021**, Echo Ridge LLC
• ** Jun 2022**, Xator Corporation
• Apr 2023, IPKeys Power Partners and IPKeys Cyber Partners
• ** Aug 2023**, Sealing Technologies, Inc.
• ** Jul 2024**, BlackSignal Technologies, Inc.
• ** Oct 2024**, BCC Engineering, Inc.
• ** Feb 2025**, TRS Group, Inc.{{citation|first=Ross |last=Wilkers |title=Parsons acquires environmental cleanup tech provider for $36M|date=February 4, 2025 |url= https://www.washingtontechnology.com/companies/2025/02/parsons-acquires-environmental-cleanup-tech-provider-36m/402739/ |publisher=Washington Technology|access-date=February 16, 2025}}
• ** Jul 2025**, Chesapeake Technology International Corp.

Controversies

Healthcare Centers in Iraq

In March 2004, Parsons was awarded a contract for a $243 million project to build 150 healthcare centers in Iraq. By March 2006, $186 million had been spent, with six centers complete and accepted by the U.S. Army Corps of Engineers (USACE);, 135 centers only partly complete; and one was reassigned to another contractor. USACE progressively terminated the contract from September 2005 to March 2006, eventually requiring Parsons to complete a total of 20 centers, with the others to be completed by other contractors. The estimated cost for the completion of the other 121 centers was $36 million. This led to Parsons and USACE disputing the degree to which the final 20 centers were completed. A report by the Special Inspector General for Iraq Reconstruction cited problems, including "high turnover among government personnel... directions... given without agreement from the contractor... program managers' responsiveness to contractor communications, cost and time reporting, administration and quality assurance".

CBOSS positive train control system

In November 2011, Parsons Corporation was awarded a $138 million contract by Peninsula Corridor Joint Powers Board (PCJB) to design and install Communications-Based Overlay Signal System Positive Train Control (CBOSS PTC) as part of the Caltrain Modernization Program. While physical installation had commenced by September 2013, execution challenges resulted in missing the 2015 installation deadline. Caltrain contracted a third party review to assess the challenges that noted program execution issues caused by both parties. By February 2017 and although much of the system had been installed (but not fully tested), Caltrain terminated its contract with Parsons for failure to perform and announced potential litigation. Caltrain then separately approved a contract with Wabtec to complete the PTC system. Parsons maintained that its contract was wrongly terminated and that all issues and delays were beyond its control. Parsons and PCJB filed lawsuits against each other seeking damages. During early stages of litigation, Parsons and the PCJB determined that non-performance by a subcontractor on the program, Alstom, substantially caused the program delivery issues. With an agreement by Parsons to waive claims against PCJB and PCJB agreeing to assign all rights to recovery over to Parsons, they jointly sued Alstom for damages in September 2021. After civil trial, judgment was finalized in September 2024 with Alstom ordered to pay monetary damages and interest of $135 million to Parsons for breach of contract obligations. Alstom has filed to appeal the ruling. Wabtec completed CBOSS PTC system installation employing 80% of the hardware and systems delivered by Parsons on the prior contract.

References

References

1. (January 24, 2022). "Parsons Corporation Board Unanimously Elects Carey Smith As Chairwoman".
2. (February 14, 2024). "Parsons Corporation 2023 Annual Report (Form 10-K)". U.S. Securities and Exchange Commission.
3. Brown, Heidi. (November 10, 2007). "Rebuilding". Forbes.
4. "Parsons Corporation 2022 Annual Report (Form 10-K)".
5. (2023-06-15). "Parsons' Carey Smith Shares Insight on Recent Company Growth & The Core Values Driving It".
6. "10-K: Annual report for year ending December 31, 2024".
7. Lake, Sydney. (2020-05-18). "35 Virginia companies make 2020 Fortune 1000 list".
8. "Palantir Technologies, Dell Technologies, and Erie Indemnity Set to Join S&P 500; Others to Join S&P MidCap 400 and S&P SmallCap 600".
9. (2003). "Historical Assessment of the Marshall Space Flight Center". National Aeronautics and Space Administration.
10. (April 12, 1951). "Notice of Intent to Register Fictitious Named Business". The Evening Tribune.
11. (October 14, 1957). "Thumbs up for performance". Aviation Week & Space Technology.
12. (August 7, 1948). "Navy to Begin Work on New Radio Weapons Test Site at Point Mugu". Santa Maria Times.
13. (October 11, 1951). "Shell to Build Sulfur Unit In Houston". The Daily Advertiser (Lafayette, LA).
14. (September 19, 1952). "Firm Designs, Builds Plant for Sulfur Extraction". News-Pilot.
15. (December 9, 1952). "Gulf Sulfur Recovery Unit in Operation". The Shreveport Journal.
16. "Ralph M. Parsons Foundation Awards $1 Million Grant to Caltech for New Research Laboratory {{!}} Caltech". The California Institute of Technology.
17. "Ralph M. Parsons Foundation {{!}} CSU".
18. (1999). "Historic Pasadena, an Illustrated History". HPN Books.
19. Ralph Vartabedian. (January 15, 1985). "ESOP Buy-Out of Parsons Wins Approval". Los Angeles Times.
20. "Exhibit 10.3 Parsons Employee Stock Ownership Plan 2019 Amendment and Restatement".
21. "History of the Bridge". Mackinac Bridge Authority.
22. (October 1, 2020). "Mackinac Bridge Authority Official Meeting Minutes".
23. Kim Slowey. (March 8, 2023). "Ames, Parsons win $284M Missouri design-build bridge project".
24. (April 4, 1996). "Tragedy Hits Home at Parsons". Los Angeles Times.
25. (October 8, 2004). "Worley Acquires Parsons E&C".
26. (October 3, 1970). "Parsons Co. Wins NASA Space Job". Los Angeles Times.
27. (28 Feb 2019). "Parsons Corp. is moving its headquarters from Pasadena to Washington, D.C., area". Los Angeles Times.
28. (9 May 2019). "In May 8 Stock Offering, Parsons Corp. Nets $500M". Engineering News-Record.
29. (May 31, 2024). "A closer look inside Parsons' IPO filing". Washington Technology.
30. "Parsons Reports 2023 Profit of $161M as Government Security Technology Work Grows".
31. (2 November 2022). "Where Parsons sees commonality between its two businesses".
32. (2025). "Hundreds of Big Post-Election Donors Have Benefited From Trump’s Return to Office". New York Times.
33. (March 2010). "Architecture and Engineering Firms of the Cold War Era".
34. "Idaho National Engineering Laboratory, HAER No. ID-33-A". Historic American Engineering Record, National Park Service.
35. (May 2008). "Historic Resources Survey and Assessment of the NASA Facility at Santa Susana Field Laboratory, Ventura County, California". Archaeological Consultants, Inc..
36. (January 23, 1953). "Contract Awarded for Turkish Plant". Tulsa World.
37. (January 7, 1959). "Contact Let for Arguello Construction". Santa Maria Times.
38. "HAER Vandenberg Air Force Base Space Launch Complex-3".
39. (September 5, 1960). "Packard Reminds Industry of Its Duty".
40. (June 19, 1959). "Big Missile Pact Goes to L.A. Firm". Los Angeles Mirror.
41. ''Howard, William E.'' [https://archive.org/stream/missilesrockets5195unse#page/n71/mode/2up Billions for ICBM Launching Facilities] // ''Missiles and Rockets'', May 11, 1959, v. 5, no. 19, p.13-14.
42. (November 27, 1966). "Ralph Parsons: An Engineer Who Made a Mountain Out of Molehill". Los Angeles Times.
43. "U.S. Army Corps of Engineers, South Atlantic Division. History of the Canaveral District". U.S. Army Corps of Engineers.
44. (June 18, 1965). "Titan-3C Success Boosts New Idea". The Evening Tribune.
45. (February 14, 1963). "Apollo Contract Awarded". The El Paso Times.
46. Michelle Nijhuis. (September 17, 2015). "The Abandoned Plan That Could Have Saved America From Drought". BuzzFeed News.
47. (March 4, 1974). "Contracts for Rail Rapid Transit Projects in Atlanta, Georgia; San Francisco, California; and Washington DC.". U.S. General Accounting Office.
48. "Hawaii Aviation - HNL 1960s".
49. Kay Lund. (September 25, 1969). "The Near Mid-Air Collisions at Airport". Honolulu Star-Bulletin.
50. (December 28, 2001). "Parsons Wins Contract to Update FAA Systems". Los Angeles Times.
51. (September 14, 1971). "Anti-Pollution Device Called 'Far Superior'". Anaheim Bulletin.
52. (October 2008). "Harnessing a Giant: 40 Years at Prudhoe Bay". Petroleum News.
53. (February 22, 2021). "Parsons Awarded $600M Ceiling U.S. Postal Service Contract".
54. Youssef M. Ibrahim. (November 17, 1979). "Vast Saudi Industrial Program". The New York Times.
55. (November 4, 1986). "Northeast Corridor - Achievement and Potential". U.S. Department of Transportation.
56. (2002). "The Role of Multinational Companies in the Middle East: The Case of Saudi Arabia". Universal-Publishers.
57. "Peacekeeper". Mark Wade.
58. (July 1983). "Final Environmental Impact Statement Space Shuttle Program, Vandenberg AFB, California". Department of the Air Force.
59. (1983). "Minerals Yearbook Volume 3 Area Reports: International". Bureau of Mines, U.S. Department of Interior.
60. (June 27, 1985). "Regular Meeting Board of Directors Southern California Rapid Transit District". Southern California Rapid Transit District.
61. (May 2, 1986). "Third Annual Work Plan for Construction Management Phase II for the Los Angeles Metro Rail Project". Southern California Rapid Transit District.
62. (February 2000). "FY 2001 Budget Estimates, Chemical Agents and Munitions Destruction, U.S. Army".
63. (1987). "Alaska's Mineral Industry 1986 Special Report 40". State of Alaska Department of Commerce and Economic Development.
64. (2013). "Mercenaries: A Guide to Private Armies and Private Military Companies". CQ Press.
65. (2008). "The Saturn V F-1 Engine: Powering Apollo into History". Springer Praxis Books.
66. (2 April 1991). "Rocket Motor Explodes During Test : Aerospace: No one is reported injured. Mishap occurs at same Edwards Air Force Base site as a fatal accident last year.". Los Angeles Times.
67. Jodi Richards. (August 2008). "Dulles Concourse Gains 15 Gates".
68. (December 20, 1987). "New Twists to an Old Suspense Story". Newsday (Nassau Edition).
69. Caroline Brady. (September 5, 1992). "Port awards contract for dry bulk terminal". San Pedro News-Pilot.
70. Carol Hazard. (June 30, 1990). "Charlotte Firm Wins $125 Million Contract". Charlotte Observer.
71. (July 20, 2023). "Southern Nevada Water Authority Board of Directors Meeting". Southern Nevada Water Authority.
72. (October 1996). "Lawrence Livermore National Laboratory. National Ignition Facility Project Acquisition Plan Revision 1". National Technical Information Service, U.S. Department of Commerce.
73. "NIF Construction". Lawrence Livermore National Laboratory.
74. "NIF is the world's largest and most energetic laser".
75. (October 11, 1995). "Parsons Engineering Pays U.S. $3,225,000 to Settle Fraud Claims".
76. Evelyn Iritini. (July 17, 1996). "Late CEOs Work to Continue As Parsons Team Wins Bosnia Pact". Los Angeles Times.
77. Bob Brewin. (September 13, 1998). "Navy Cleans Up Hawaiian Island".
78. Gregg K. Kakesako. (November 7, 2003). "Navy's Kahoolawe cleanup nears finish". Honolulu Star-Bulletin.
79. (October 30, 1998). "Guangzhou airport architects named as Parsons and URS". South China Morning Post.
80. Paul Bradley. (November 19, 1998). "Wilson Bridge Design Set". Richmond Times-Dispatch.
81. (September 19, 2002). "Letter from Office of Environmental Management to Chairman, Defense Nuclear Facilities Safety Board, Department Of Energy".
82. "Tacoma Narrows Suspension Bridge". Verdict Media Unlimited.
83. (February 2007). "A New Suspension Bridge at the Historic Tacoma Narrows Site". Structure Magazine.
84. Long, Priscilla. (July 17, 2007). "New Tacoma Narrows Bridge is dedicated on July 15, 2007". HistoryLink.org.
85. (January 20, 2004). "Chemical weapons disposal process unveiled". The Advocate-Messenger.
86. (July 7, 2023). "US Completes Chemical Weapons Stockpile Destruction Operations". United States Department of Defense.
87. (November 30, 2004). "Onondaga Lake Feasibility Study Executive Summary". Honeywell.
88. (1 Nov 2004). "Florida repairs hurricane damaged bridge". Civil+Structural Engineer.
89. (1 Nov 2004). "2004 – I-10 Bridge over Escambia Bay (original emergency repair)". Florida International University.
90. (Jun 21, 2005). "Parsons-Odebrecht to be general contractor at MIA". South Florida Business Journal.
91. Helen Norman. (August 5, 2016). "Parsons-Odebrecht awarded BHS contract for Miami Airport". Passenger Terminal Today.
92. (November 6, 2006). "Dubai Takes First Steps in Building Region's First Metro". Engineering News-Record.
93. (April 2010). "LAX Completes $723 Million Renovation in March".
94. Jodi Richards. (December 2013). "Los Angeles Int'l Unveils Redeveloped International Terminal". Airport Improvement.
95. (September 1, 2021). "From the ashes: The Pentagon renovation".
96. (March 12, 2012). "Construction completed on Audubon Bridge". Roads and Bridges.
97. (November 14, 2012). "DOTD John James Audubon Bridge project named winner of DBIA 2012 Design Excellence Award". Louisiana Department of Transportation and Development.
98. Yamurai Zendera. (January 24, 2015). "Site visit: Abu Dhabi Cultural District". Construction Week Online.
99. Michael Fahy. (October 7, 2014). "Parsons to manage Dubai Design District project". Construction Week (Middle East).
100. (21 April 2016). "Parsons Lands Capitol Campus Construction Mgmt Deal; Mary Ann Hopkins Comments".
101. (March 10, 2016). "WTC PATH Transportation Hub".
102. Chris Hill. (June 12, 2017). "I-80 SMART Corridor Project awarded Operational Efficiency Project of the Year". Equipment World.
103. (December 10, 2012). "Abu Dhabi International Airport Midfield Terminal, Abu Dhabi".
104. (April 13, 2018). "Leidos taps Parsons for construction support for National Science Foundation Antarctic operations". ExecutiveBiz.
105. (March 7, 2019). "National Science Board Authorizes NSF To Begin Revitalization of McMurdo Station.". Antarctic Sun.
106. Cordell, Carten. (6 December 2019). "Leidos, Parsons win spot on $4B nuclear material cleanup contract".
107. Zaymamz Malz. (May 19, 2020). "Ontario's Parsons awarded $61mn contract for new Windsor-Detroit Bridge". BizClik Media Group.
108. Mehta, Aaron. (September 25, 2020). "Air Force awards laser-armed RADBO contract to Parsons". Defense News.
109. (3 December 2020). "Parsons Working with U.S. Navy to Rebuild China Lake".
110. Writer. (May 17, 2021). ["Parsons wins $185 million Space Force contract for technology services"](https://spacenews.com/parsons-wins-185-million-space-force-contract-for-technology-services/#:~:text=Parsons%20wins%20%24185%20million%20Space%20Force%20contract%20for%20technology%20services,-by%20Sandra%20Erwin&text=Parsons%20supports%20Space%20Force%20classified,Systems%20Integration%20and%20Management%20Center).
111. (July 15, 2021). "Parsons wins contract from MDA to provide TEAMS services". Naval Technology.
112. (20 June 2022). "Parsons to Compete for Tasks Under DHA's $10B Medical Research Contract".
113. (February 2, 2023). "Parsons confirmed delivery partner for 170km The Line at NEOM, Saudi Arabia". Construction Week Online.
114. (March 14, 2024). "Awards to SeaTech Global Security Solutions and Parsons Government Services International, Inc. valued up to a combined $1 billion".
115. (29 April 2024). "Parsons Wins Position on $464M U.S. Army Remediation Contract, Showcases Financial Strength".
116. Wilkers, Ross. (2025-06-24). "The Federal Aviation Administration is eyeing 2028 to complete its replacement of the National Airspace System's underlying infrastructure".
117. Staff Writer. (Jul 26, 2022). "Parsons Promotes Matt Ofilos to CFO, Names George Ball & Ellen Lord to Board".
118. Ball, Jack. (July 4, 2019). "Parsons eyes opportunities to grow built environment business in Saudi Arabia". Architect.
119. Dadlani, Disha. (February 8, 2022). "NEOM picks Parsons to provide project management for OXAGON". Construction Week.
120. (March 6, 2023). "Form DEF 14A: Parsons Corporation Definitive proxy statements".
121. (June 7, 1961). "Parsons Co. Acquires New York City Firm". Los Angeles Times.
122. (June 23, 1966). "Parsons Co. to Acquire Vitro Unit". Los Angeles Times.
123. (June 7, 1971). "Ralph. M. Parsons Co. has acquired control of a Dillingham Corp. Unit". Los Angeles Times.
124. (September 19, 1977). "Parsons Buys Houston Firm". Pittsburgh Post-Gazette.
125. (October 18, 1977). "Industry Notes". Los Angeles Times.
126. (May 5, 1981). "Industry Notes". Los Angeles Times.
127. (March 31, 1985). "The C.T. Main Corporation has been acquired by The Parsons Corporation". The Boston Globe.
128. (February 8, 2020). "Steinman, Boynton, Gronquist & Birdsall Profile".
129. (March 3, 1995). "Update, Around The State". The Morning Call (Allentown, PA).
130. (5 May 2005). "Parsons Acquires The Alaris Group". Los Angeles Times.
131. (10 June 2006). "Parsons acquires 3D/International". Los Angeles Times.
132. (5 March 2009). "Herndon's McMunn Associates sold to Parsons". Washington Business Journal.
133. (19 October 2011). "Parsons makes $350M deal to pull services unit out of Cobham". Washington Technology.
134. (April 1, 2014). "Engineering giant Parsons acquires Delcan". Canadian Consulting Engineer.
135. (21 Apr 2014). "Parsons deepens cybersecurity capability through latest acquisition". Washington Technology.
136. (30 Nov 2017). "Parsons acquisition will boost company's defense against cyber attacks". Pasadena Star-News.
137. (21 May 2018). "Parsons acquires Polaris Alpha, seeks bigger footprint in defense, space, intelligence". Space News.
138. (8 Jan 2019). "Parsons makes another intell-focused deal". Public Sector 360.
139. (22 Jul 2019). "Parsons to acquire QRC". Inside Defense.
140. (29 Oct 2020). "Parsons to acquire space and cybersecurity firm Braxton Science & Technology Group". Space News.
141. (10 Jun 2021). "Parsons to purchase BlackHorse Solutions for $203M". Virginia Business.
142. (4 Aug 2021). "Parsons Corporation acquired Echo Ridge, LLC for approximately $9M". Market Screener.
143. (2 Jun 2021). "Parsons Closes Xator Acquisition". GovCon Wire.
144. (4 Aug 2021). "Parsons Corporation acquired IPKeys". Market Screener.
145. (23 Aug 2023). "Parsons Acquires SealingTech". Globe News Wire.
146. Wilkers, Ross. (July 31, 2024). "Parsons CEO lays out rationale for $200M BlackSignal buy". Washington Technology.
147. Wilkers, Ross. (October 21, 2024). "Parsons acquires transportation engineering company for $230M". Washington Technology.
148. Wilkers, Ross. (July 1, 2025). "Parsons acquires Chesapeake Technologies in $89M transaction".
149. Stuart W. Bowen, Jr.. (February 15, 2007). "Statement of Stuart W. Bowen, Jr. Special Inspector General for Iraq Reconstruction before the United States House Oversight and Government Reform Committee U.S. Contracting in Iraq". House Government Reform Committee.
150. Jenny Mandel. (May 1, 2006). "Report details problems with contract for Iraq health centers".
151. (October 6, 2011). "Design/Procure/Install a Communication Based Overlay Signal System (CBOSS)/ Positive Train Control (PTC) System: Recommendation for Contract Award".
152. (September 17, 2013). "Caltrain Modernization Kicks Off Advanced Signal System Work". Peninsula Corridor Joint Powers Board.
153. North American Transit Services Association. (July 4, 2016). "American Public Transportation Association Peer Review for Caltrain, San Carlos, California". Peninsula Corridor Joint Powers Board.
154. (February 24, 2017). "Caltrain Terminates Contract with Parsons Transportation Group (PTG)". Peninsula Corridor Joint Powers Board.
155. (August 22, 2018). "Caltrain Receives $18.7 Million Grant for Positive Train Control Project".
156. (February 27, 2017). "Rail News - Caltrain nixes PTC contract with Parsons".
157. Renda, Matthew. (March 6, 2017). "Caltrain, Safety Contractor Trade Lawsuits". Courthouse News Service.
158. {{cite court. (March 11, 2022). link
159. {{cite court. (September 23, 2024). link
160. {{cite court. (October 1, 2024). link
161. Cordoba, Eric. (March 6, 2019). "Memorandum: Update on the Caltrain Modernization Program and Business Plan". San Francisco County Transportation Authority.