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By finding companies that are a good cultural fit and by fully integrating them into our team, we are able to achieve a collective success that represents the contributions of all our hardworking employees and provides value to our shareholders.

As we move forward, our strategy is to continue acquiring firms that allow us to deepen our geographic positioning and expand our service capabilities. Together, we are able to strengthen and expand our client relationships and better position ourselves to win more projects and attract talented employees.

Environmental Systems Design, Inc.
Chicago, Illinois?| June 2023 | Buildings |?News Release?|?More

L2P
Philadelphia, Pennsylvania?| October 2022 | Buildings |?News Release?|?More

Barton Willmore
Reading, United Kingdom | April 2022 | Infrastructure |?News Release?|?More

Cox|McLain Environmental Consulting, Inc.
Austin, Texas | December 2021 | Environmental Services |?News Release?|?More

Cardno
Brisbane, Australia | December 2021 | Environmental Services, Infrastructure, Water |?News Release?|?More

Driven by Values
Eindhoven, the Netherlands?| November 2021 | Environmental Services |?News Release?|?More

Paleo Solutions
Monrovia, California | September 2021 | Environmental Services |?News Release?|?More

Engenium
Perth, Australia | April 2021 | Mining|?News Release?|?More

GTA
Melbourne, Australia | March 2021 | Transportation |?News Release?|?More

Wenck
Maple Plains, Minnesota | December 2020 | Environmental Services |?News Release?|?More

AGEL adviseurs
Oosterhout, the Netherlands? | December 2020 | Environmental Services |?News Release?|?More

Teshmont
Winnipeg, Manitoba | September 2020 | Energy & Resources |?News Release?|?More

WGE
Perth, Australia | March 2019 | Buildings, Infrastructure

True Grit Engineering
Thunder Bay, Ontario | October 2018 | Environmental Services, Infrastructure

Peter Brett Associates
Reading, England | September 2018 | Buildings, Infrastructure, Environmental Services

Cegertec
Chicoutimi, Quebec?| May 2018 | Energy & Resources, Buildings, Infrastructure?

Norwest
Calgary, Alberta | May 2018 | Energy & Resources, Mining

TDG
Wellington, New Zealand?| April 2018 | Transportation

OEI
Albuquerque, New Mexico | March 2018 | Water?

ESI Consulting
Shrewsbury, United Kingdom | March 2018 | Environmental Services?

North State Resources, Inc. (NSR)
Redding, California | October 2017 | Environmental Services

RNL
Denver, Colorado | July 2017 | Buildings

Inventrix, Engineering Inc.
Seattle, Washington?| April 2017 | Buildings

Architecture|Tkalcic Bengert
Edmonton, Alberta | December 2016 | Buildings

Edwards & Zuck
New York, New York | September 2016 | Buildings

VOA Associates Incorporated
Chicago, Illinois | May 2016 | Buildings

MWH Global, Inc.
Broomfield, Colorado?| May 2016 | Infrastructure

Bury, Inc.
Austin, Texas | March 2016 | Infrastructure

Infrastructure Americas Division of KBR
Houston, Texas | December 2015 | Infrastructure

Fay, Spofford & Thorndike
Boston, Massachusetts | October 2015 | Infrastructure

VA Consulting
Irvine, California | August 2015 | Infrastructure

VI Engineering LLC
Houston Texas | July 2015 | Energy & Resources

Sparling
Lynnwood Washington | March 2015 | Buildings

Dessau
Montreal Quebec | January 2015 | Buildings Infrastructure Transportation

Penfield & Smith
Santa Barbara California | October 2014 | Infrastructure

ADD Inc.
Boston Massachusetts?| September 2014 | Buildings

USKH Inc.
Anchorage Alaska | June 2014 | Buildings Infrastructure

Wiley Engineering
Marietta Georgia | June 2014 | Oil & Gas

SHW Group
Dallas Texas | May 2014 | Buildings

JBR Environmental Consultants Inc.
Sandy Utah | May 2014 | Environmental Services

Processes Unlimited International Inc.
Bakersfield California | March 2014 | Oil & Gas

Williamsburg Environmental Group Inc. and Cultural Resources Inc.
Williamsburg Virginia | January 2014 | Environmental Services

Cambria Gordon Ltd.
Terrace British Columbia | November 2013 | Environmental Services

JDA Architects
Halifax Nova Scotia | November 2013 | Architecture

Roth Hill LLC
Bellevue Washington | June 2013 | Water / Wastewater Engineering

AP/ID (Ashley-Pryce Interior Design)
Vancouver British Columbia | May 2013 | Interior Design

IBE Consulting Engineers
Sherman Oaks California | May 2013 | Buildings Engineering

Greenhorne & O'Mara
Laurel Maryland | December 2012 | Transportation, Environment, Urban Land

Landmark Survey and Mapping Inc.
Washington Pennsylvania | December 2012 | Industrial

C3TS
Coral Gables Florida | November 2012 | Transportation, Urban Land, Architecture, Environment

Architecture 2000
Moncton New Brunswick | November 2012 | Architecture

Cimarron Engineering Ltd.
Calgary Aberta | August 2012 | Oil & Gas, Power & Energy

ABMB Engineers Inc.
Baton Rouge Louisiana | May 2012 | Transportation

PHB Group Inc.
St. John's Newfoundland | May 2012 | Buildings

ENTRAN Inc.
Lexington Kentucky | October 2011 | Transportation

FSC Architects and Engineers
Yellowknife Northwest Territories | October 2011 | Buildings

Bonestroo Inc./Bonestroo Services LLC
St. Paul Minnesota | September 2011 | ?Urban Land, Environment, Transportation

The Caltech Group
Calgary Alberta | May 2011 | Oil & Gas Power

QuadraTec Inc.
St. John¡¯s Newfoundland and Labrador | February 2011 | Buildings and Industrial

Burt Hill
Butler PA | December 2010 | Architecture, Interior Design, Planning & Landscape Architecture, Sustainable Development

Street Smarts
Duluth GA | October 2010 | Transportation

ECO:LOGIC
Rocklin CA | September 2010 | Environmental Infrastructure

Anshen + Allen
San Fransisco CA | September 2010 | Architecture & Interior Design

CommArts
Boulder Colorado | August 2010 | Buildings

Industry and Energy Associates LLC (IEA)
Portland Maine | ?July 2010 | Industrial

WilsonMiller
Naples Florida | July 2010 | Buildings, Transportation, Urban Land, Environment

Natural Resources Consulting (NRC)
Cottage Grove Wisconsin | July 2010 | Environment

TetrEs
Winnipeg Manitoba | May 2010 | Environment

PCGI
Toronto Ontario| March 2010 |Program Management

Granary Associates
Philadelphia PA | October 2009 | Architecture, Engineering, and Project Management

Jacques Whitford
Halifax Nova Scotia | January 2009 | Environmental

McIntosh Engineering (McIntosh)
Tempe Arizona and Sudbury and North Bay Ontario | July 2008 | Mining

RHL Design Group Inc. (RHL)
Petaluma California | March 2008 | Urban Land

Secor International Incorporated (Secor)
Redmond Washington | February 2008 | Environmental

Rochester Signal Inc.
Rochester New York | January 2008 | Transportation

R.D. Zande
Columbus Ohio | December 2007 | Environmental

Fuller Mossbarger Scott & May Engineers (FMSM)
Lexington Kentucky | December 2007 | Environmental and Geotechnical

Murphy Hilgers Architects
Toronto Ontario | November 2007 |Architecture, Interior Design, and Facilities Planning

Moore Paterson Architects
Victoria British Columbia | November 2007 | Architecture, Planning and Project Management

Neill and Gunter
Fredericton New Brunswick; Halifax Nova Scotia; and Portland Maine | October 2007 | Industrial

Woodlot Alternatives
Topsham Maine | October 2007 | Environmental

Chong Partners Architecture Inc.
San Francisco California | September 2007 | Architecture, Interior Design, and Planning

Trico Engineering Consultants Inc.
Charleston South Carolina | September 2007 | Civil Engineering, Surveying, Landscape Architecture, and Planning

Geller DeVellis Inc.
Boston Massachusetts | May 2007 | Planning, Landscape Architecture and Civil Engineering Design

Land Use Consultants Inc.
Portland Maine | April 2007 | Planning, Landscape Architecture and Engineering

Vollmer Associates LLP
New York City New York | April 2007 | Transportation

ACEx
Oakland California | May 2006 | Transportation

Dufresne-Henry
North Springfield Vermont | April 2006 | Environmental, Urban Land, Buildings, and Transportation

Carinci Burt Rogers Engineering (CBR)
Toronto Ontario | March 2006 | Buildings

Keen Engineering
Vancouver British Columbia | October 2005 | Buildings Engineering

The Keith Companies
Irvine California | September 2005 | Urban Land

CPV Group Architects & Engineers
Calgary Alberta; Vancouver British Columbia | August 2005 | Architecture & Interior Design, Buildings Engineering

Dunlop Architects
Toronto Ontario | October 2004 | Architecture & Interior Design

GBR Architects Limited
Winnipeg Manitoba | April 2004 | Architecture & Interior Design

Sear-Brown Group Inc.
Rochester New York | April 2004 | Architecture, Engineering, Planning, and Bio/Pharmaceuticals

Inner Dimension Design Associations
Regina Saskatchewan | December 2003 | Architecture & Interior Design

Optimum Energy Management
Calgary Alberta | November 2003 | Power, Resources & Chemicals

ESG International
Guelph Ontario | May 2003 | Environmental Management

Architectura
Vancouver British Columbia | January 2003 | Architecture & Interior Design

Beak International Incorporated
Brampton Ontario; Lancaster New York | October 2002 | Environmental Management

The RPA Group
Toronto Ontario; Calgary Alberta; Vancouver British Columbia | July 2002 | Program & Project Management

English Harper Reta Architects
Sacramento California | June 2002 | Buildings

Site Consultants
Columbia South Carolina | June 2002 | Transportation, Environment, and Urban Land

GeoViro Engineering Ltd.
Vancouver British Columbia | May 2002 | Environment

Graeme & Murray Consultants Ltd
Victoria British Columbia | April 2002 | Transportation

GKO Engineering (including PharmaChem)
Edmonton Alberta | March 2002 | Industrial

Cosburn Patterson Mather Limited
Markham Ontario | February 2002 | Urban Land

Webster & Simmonds Surveying Ltd.
Ottawa Ontario | February 2002 | Urban Land

McCartan Gaudet & Associates Partnership
Saskatoon Saskatchewan | January 2002 | Buildings

Yoneda & Associates Partnership
Regina Saskatchewan | January 2002 | Buildings

Taggart Engineering Associates
Denver Colorado | December 2001 | Environment

Associated Consulting Engineers Ltd.
St. Michael Barbados | November 2001 | Buildings

The Pentacore Family Group of Companies
Las Vegas Nevada | November 2001 | Urban Land, Transportation, Environment, and Buildings

the ellard croft design group
Regina Saskatchewan; Saskatoon Saskatchewan | July 2001 | Buildings

The Spink Corporation
Sacramento California | March 2001 | Buildings, Transportation, Environment, and Urban Land

Tipton and Kalmbach Inc.
Denver Colorado | January 2001 | Environment

EnviroNet Inc.
Phoenix Arizona | December 2000 | Environment

DSAtlantic
Raleigh North Carolina; Winston-Salem North Carolina; Charlotte North Carolina; Charleston South Carolina; Columbia South Carolina; Richmond Virginia; Nashville Tennessee; Macon Georgia; McDonough Georgia | November 2000 | Buildings, Environment, Industrial, Transportation, and Urban Land

P.R. Fletcher & Associates Inc.
Denver Colorado | April 2000 | Urban Land

EWP Engineering Inc.
Salt Lake City Utah | February 2000 | Environment, Transportation, and Urban Land