04 AECOM
AECOM is an American multinational engineering firm based primarily in Los Angeles that provides design , consulting , construction , and management services to a wide range of clients . AECOM has approximately 87,500 employees , and is number 156 on the 2016 Fortune 500 list with 2016 revenue standing at $ 17.4bn . AECOM is the world ’ s number one Global Design Firm according to Engineering News Record . 03 FLUOR CORPORATION
Headquartered in Irving , Texas , Fluor
Corporation boasts more than 61,550 employees and a revenue of more than $ 19bn as of 2016 . The firm is the largest
Fortune 500 company in the construction and engineering industries . It consists of more than 30 subsidiaries and built notable projects like the Aladdin Hotel & Casino in Las Vegas , missile sites in Arizona , the Tappan Zee Bridge that spans New York ’ s Hudson River and the 800-mile-long Trans-Alaska Pipeline System . 27