List of the Largest Engineering Companies in Ontario

Name	Sector	Revenue $mlns	M&A Activity			Last 5 Years
Name	Sector	Revenue $mlns	Total	Buy	Sell	Last 5 Years
ATS Toronto (TSX) : ATS Cambridge, Ontario, Canada website	Engineering	2,305	15	15	-
IBI Acquired Arcadis 2022-07-18 $663.54M Toronto, Ontario, Canada website	Engineering	423	6	6	-
Wardrop Engineering, Inc. Acquired Tetra Tech 2009-01-29 Toronto, Ontario, Canada website	Engineering	120	-	-	-
SENES Consultants Ltd. Acquired Arcadis 2013-03-21 Richmond Hill, Ontario, Canada website	Engineering	24	-	-	-
Chih S. Huang & Associates, Inc. Acquired CCI Group 2015-02-02 Markham, Ontario, Canada	Engineering	-	-	-	-
AMTEK Engineering Services Ltd. Acquired Calian 2014-05-07 Ottawa, Ontario, Canada website	Engineering	-	-	-	-
Randal Brown & Associates Engineering Ltd. Acquired Jensen Hughes 2015-05-08 Toronto, Ontario, Canada website	Engineering	-	-	-	-
NA Engineering Associates, Inc. Acquired Westinghouse Electric 2019-07-22 Stratford, Ontario, Canada website	Engineering	-	-	-	-
AIA Engineers LLC Acquired CONSOR Engineers 2019-01-05 Mississauga, Ontario, Canada website	Engineering	-	-	-	-
MDA - Nuclear Assets Acquired Calian 2024-03-05 Brampton, Ontario, Canada	Engineering	-	-	-	-
Halsall Associates Ltd. Acquired Parsons Brinckerhoff Group, Inc. 2010-10-13 Toronto, Ontario, Canada website	Engineering	-	-	-	-
Murphy Hilgers Architects, Inc. Acquired Stantec 2007-11-26 Toronto, Ontario, Canada website	Engineering	-	-	-	-
Smith and Long Ltd. Private Markham, Ontario, Canada website	Engineering	-	1	1	-
R.V. Anderson Associates Ltd. Private Toronto, Ontario, Canada website	Engineering	-	1	1	-
Swallow Acoustic Consultants Ltd. Acquired Thornton Tomasetti, Inc. 2016-12-19 Mississauga, Ontario, Canada website	Engineering	-	-	-	-
IRC Building Sciences Group Acquired Rimkus Consulting Group 2020-11-20 Mississauga, Ontario, Canada website	Engineering	-	-	-	-

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