Based in Omaha , Nebraska , Kiewit Corporation is an employee-owned contractor who has earned a solid place on the Fortune 500 . With a revenue of $ 9bn , Kiewit Corporation operates an extensive network of subsidiaries and offices throughout the United States , providing engineering and construction services in sectors such as telecommunications , transportation , oil , mining and more .

Turner Construction is one of the country ’ s

largest construction consultant companies with a sales volume in 2014 of $ 10bn . Headquartered in New York City , this international company focuses on projects in the education , green buildings , aviation , pharmaceuticals industries and others . Employing more than 5,200 workers , Turner Construction is the name behind construction projects like Madison Square Garden and Yankee Stadium in New York , the Rock and Roll Hall of Fame in Cleveland , Ohio and the United States Patent and Trademark Office in Alexandria , Virginia .

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