Gary A. Brennen

Syska Hennessy Group, Inc. provides engineering, consulting and commissioning solutions. Its services include architectural lighting design, audio-visual, building science and technologies, commissioning, engineering the architecture, facilities management, information technology and telecommunications and medical communications. The company was founded by Adolph G. Syska and John F. Hennessy in 1928 and is headquartered in New York, NY.

SH Group, Inc provides engineering, consulting and commissioning services. it also provides architectural lighting design, audio-visual, building science and technologies, commissioning, energy services, engineering the architecture, facilities management, information technology and telecommunications, medical communications, security and vertical transportation services. The firm's customers include the aviation, central energy plans, education, entertainment and government industries. The company was founded by Barry Stuart Sternlicht in 2006 and is headquartered in New York, NY.