10 Biggest Construction Companies in the US

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8. Washington Group International

The Washington Group started in 2000 and was formed through the merger of Morrison Knudsen Corporation and Raytheon Engineers & Constructors. They have a very sizeable presence in the United States and have offices in 48 other countries as well. The company’s headquarters is located in Boise, Idaho.

Biggest Construction Companies in the US

Page 3 of 10