 In 2016, Ammann & Whitney merged with Louis Berger to form Louis Berger U.S.

Ammann & Whitney was founded in 1946 by Othmar Ammann, a bridge designer, and Charles S. Whitney, a designer of innovative structures.Whitney's innovations include collaborations with Eero Saarinen on early thin-shell concrete structures such as Kresge Auditorium (1955), TWA Flight Center (1962), and the main terminal at Dulles International Airport (1962).Ammann & Whitney has since grown into an international firm.