Skidmore, Owings & Merrill
Thornton Tomasetti
AECOM
Kohn Pedersen Fox
WSP USA
Populous (company)
Bechtel
Lendlease
HOK (firm)
Tishman (company)
Arup Group
WSP Global
Vornado Realty Trust
German construction company
The Turner Construction Company is an American construction company with presence in 20 countries. It is a subsidiary of the German company Hochtief. Wikipedia