Founded in 1944 by Ralph M. Parsons and headquartered in Centreville, Virginia, Parsons Corporation (NYSE: PSN) is a leading disruptive technology and engineering firm serving the global infrastructure, defense, and security markets. With a workforce of more than 18,500 employees operating across the Americas, the Middle East, and Europe, Parsons has planned, designed, and managed some of the most complex transportation and rail systems in modern history.

Parsons covers the complete railway engineering and transit lifecycle: route alignment optimization, trackbed and civil structures design, complex rail viaducts, tunneling, CBTC and Positive Train Control (PTC) systems integration, electrification, rail communications, and station architecture. The firm is especially noted for its role as a premier Program Management Consultant (PMC), Owner’s Representative, and Lead Designer on large-scale Alternative Project Delivery (Design-Build and P3) rail schemes.

Major transit achievements include serving as program manager and engineer for the Riyadh Metro (Lines 1 and 2), delivering systems engineering for the Washington Metropolitan Area Transit Authority (WMATA) Silver Line, design and construction management for the Los Angeles Metro Foothill Gold Line, program management for the Newark AirTrain replacement, and leading train control integration and PTC deployment across passenger and freight corridors throughout North America.