"Customers count on us to deliver their most complex projects, which help build economies and transform communities," Bechtel president and CEO Bill Dudley said.

"The 53,000 men and women who work at Bechtel take that responsibility to heart and work every day to keep our customers' trust by staying true to our guiding principles of safety, quality, and integrity."

While the major private engineering house was ranked first out of the Top 400 Contractors list, Bechtel also won top 20 spots for ENR's more specialised petroleum, transportation, power and industry lists.