Skidmore, Owings & Merrill
HOK (firm)
Kohn Pedersen Fox
Arup Group
AECOM
Populous (company)
HKS, Inc.
Thornton Tomasetti
Hyatt
United Airlines
Brookfield Properties
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