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For more than 70 years, we continue to grow through organic expansion and strategic acquisition. Here’s a look back at the talent and skills we’ve acquired along the way. To see our journey through projects, visit our History/Timeline or our featured Projects.
Polaris Alpha
Advanced, Technology-Focused Provider of Innovative Mission Solutions for Complex Defense, Intelligence, and Security Customers, as Well as Other U.S. Federal Government Customers.
Williams Electric Company
Control system integration, electrical and general contracting, and energy infrastructure solutions to the U.S. Government
T.J. Cross Engineers, Inc.
Engineering, Design, and Professional Consulting Services to the Oil and Gas Industry
Delcan
Integrated Systems and Infrastructure Solutions within the Rail and Transit, Road and Highway, Structures, Water, Freight, and Intelligent Transportation Systems Markets
Secure Mission Solutions
End-to-End Integrated Security Solutions in the Electronic, Information, Communications, Network, and Cybersecurity Domains
First Support Services, Inc.
Facility Operations and Maintenance Services, Logistics Support, Transportation Support, and Telecommunications Operations Services to the U.S. Government
CT MAIN Engenheiros
Project Management and Technical Services to the Energy and Infrastructure Market in Brazil
O’Connor Associates Environmental Inc.
Environmental Site Investigation and Remediation
SPARTA, Inc. (dba Cobham Analytic Solutions)
Advanced Systems Engineering, Cybersecurity, and Mission Support Services to the Defense Intelligence, and Homeland Security Sectors of the U.S. Government
Vasey Aviation Group LLC
Program Management, Operations, Strategy, and Capital Planning Services to the Aviation Industry
McMunn Associates, Inc. (MAI)
Analytical, Technical, Training, and Management Services and Solutions to the U.S. Intelligence Community
3D/International (3D/I)
Program Management, Condition Assessment, Design, Construction, and Information Technology for the Vertical Facility Environment
RCI Construction Group (RCI)
Water and Wastewater, Transportation, Urban Infrastructure, Civil and Industrial Construction, Environmental Site Remediation, Residential and Commercial Development
The Alaris Group LLC (Alaris)
Wireless Telecommunications Site Development Services
META Associates, Inc (META)
Program Management Ranging from Facility Planning to Design-build Construction
MWC (MW Consultants)
Engineering and Construction for Pharmaceuticals, Biotechnology, Life Sciences
PFI (Process Facilities Inc.)
Program Management, Manufacturing for Pharmaceuticals, Life Sciences
Primus Infrastructure Inc.
Water and Infrastructure, Capital Improvement Projects, Program Management
H.E. Hennigh, Inc.
Telecommunications General Contracting
Finley McNary Engineers, Inc.
Bridge Engineering
Protect Air, Inc.
Vehicle Emissions Inspection and Compliance, Data Management
Gilbert/Commonwealth Inc. (Gilbert)
Power Plant Design and Nuclear Facility Decommissioning
Steinman Boynton Gronquist & Birdsall (Steinman, SBGB)
Bridge Design and Engineering
The C.T. Main Corporation
Power and Industrial Engineering
Harland Bartholomew and Associates (HBA)
Urban and Military Planning
Barton-Aschman Associates (BAA)
Traffic Planning
Brian Watt & Associates, Inc.
Petroleum Drilling and Construction
Engineering Science, Inc. (ES, PES)
Environmental Consulting Services
Parsons Corporation
Holding Company for RMP, DCC, and SIP
Parsons Constructors, Inc. (PCI)
Construction Services
De Leuw, Cather & Company (DCC)
Transportation Engineering, Design, Construction
SIP, Inc.
Petroleum and Chemical Design and Engineering
Barry and Richardson
Sulfur Recovery, Mining, Petrochemical Design
Dillingham Engineering Party
Mining, Petrochemical Engineering Design
Vitro Engineering
Nuclear Fuel Reprocessing
Anaconda-Jurden Associates
Mining, Engineering, Design/Construction of Metallurgy Facilities
E.A. Bender Drilling Company
Oil Well Drilling and Exploration
The Ralph M. Parsons Company (RMP)
Engineering, Procurement, Construction Services for Government, Petrochemical, and Infrastructure Clients