SOM (architectural firm)
Arup Group
Kohn Pedersen Fox
HOK (firm)
Turner Construction
AECOM
Hilton Hotels & Resorts
Hilton Worldwide
HKS, Inc.
Four Seasons Hotels and Resorts
W Hotels
The Ritz-Carlton Hotel Company
Thornton Tomasetti
American design and architecture firm
gensler.com
Gensler is a global design and architecture firm headquartered in San Francisco, California. It is the largest architecture firm in the world by revenue and number of architects. Wikipedia