Headquarters. New York City

Branch Offices. Syska Hennessy Group has offices in Princeton, N.J.; Cambridge, Mass.; Fairfax, Va.; Chicago; Jacksonville, Fla.; Las Vegas; Los Angeles; San Diego; San Francisco; and Seattle.

Roots. Mechanical engineers Adolph Syska and John Hennessy formed their partnership in 1928.

Areas of Expertise. Syska Hennessy Group offers consulting, engineering, technology, and construction services.

Key Markets. Institutional, health-care, science and technology, commercial, aviation, power plants, and distribution.