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Parsons Corporation
Parsons Corporation is an American multinational technology-focused defense, intelligence, and infrastructure engineering firm. Founded in 1944, Parsons is headquartered in Chantilly, Virginia, and serves both government and private sector organizations in more than 30 countries.
Parsons became a public company after its initial public offering (IPO) in 2019. It was included in the Fortune 1000 in 2020 and added to the S&P 400 in 2024. As of late 2025, Parsons employs over 21,000 professionals worldwide.
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.
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Parsons Corporation
Parsons Corporation is an American multinational technology-focused defense, intelligence, and infrastructure engineering firm. Founded in 1944, Parsons is headquartered in Chantilly, Virginia, and serves both government and private sector organizations in more than 30 countries.
Parsons became a public company after its initial public offering (IPO) in 2019. It was included in the Fortune 1000 in 2020 and added to the S&P 400 in 2024. As of late 2025, Parsons employs over 21,000 professionals worldwide.
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.