Growth of Capabilities

Our Expansion and Strategic Acquisition

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.

2017

Williams Electric Company
Control system integration, electrical and general contracting, and energy infrastructure solutions to the U.S. Government

2015

T.J. Cross Engineers, Inc.
Engineering, Design, and Professional Consulting Services to the Oil and Gas Industry

2014

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

2013

First Support Services, Inc.
Facility Operations and Maintenance Services, Logistics Support, Transportation Support, and Telecommunications Operations Services to the U.S. Government

2012

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

2011

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

2010

Vasey Aviation Group LLC
Program Management, Operations, Strategy, and Capital Planning Services to the Aviation Industry

2009

McMunn Associates, Inc. (MAI)
Analytical, Technical, Training, and Management Services and Solutions to the U.S. Intelligence Community

2006

3D/International (3D/I)
Program Management, Condition Assessment, Design, Construction, and Information Technology for the Vertical Facility Environment

2005

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

2004

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

2001

H.E. Hennigh, Inc.
Telecommunications General Contracting

Finley McNary Engineers, Inc.
Bridge Engineering

2000

Protect Air, Inc.
Vehicle Emissions Inspection and Compliance, Data Management

1995

Gilbert/Commonwealth Inc. (Gilbert)
Power Plant Design and Nuclear Facility Decommissioning

1988

Steinman Boynton Gronquist & Birdsall (Steinman, SBGB)
Bridge Design and Engineering

1985

The C.T. Main Corporation
Power and Industrial Engineering

Harland Bartholomew and Associates (HBA)
Urban and Military Planning

Barton-Aschman Associates (BAA)
Traffic Planning

1984

Brian Watt & Associates, Inc.
Petroleum Drilling and Construction

1981

Engineering Science, Inc. (ES, PES)
Environmental Consulting Services

1978

Parsons Corporation
Holding Company for RMP, DCC, and SIP

Parsons Constructors, Inc. (PCI)
Construction Services

1977

De Leuw, Cather & Company (DCC)
Transportation Engineering, Design, Construction

SIP, Inc.
Petroleum and Chemical Design and Engineering

1972

Barry and Richardson
Sulfur Recovery, Mining, Petrochemical Design

1971

Dillingham Engineering Party
Mining, Petrochemical Engineering Design

1966

Vitro Engineering
Nuclear Fuel Reprocessing

1961

Anaconda-Jurden Associates
Mining, Engineering, Design/Construction of Metallurgy Facilities

1945

E.A. Bender Drilling Company
Oil Well Drilling and Exploration

1944

The Ralph M. Parsons Company (RMP)
Engineering, Procurement, Construction Services for Government, Petrochemical, and Infrastructure Clients

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