Founded in 1956, D'APPOLONIA has grown to be an industry leader in providing consulting engineering services. Headquartered in western Pennsylvania, D'APPOLONIA continues to expand upon its history in providing engineering and scientific services for industrial, commercial and governmental clients in the U.S. and in many foreign countries found in Europe, Africa, Asia, and the North and South America. D'APPOLONIA's core capabilities include geotechnical, civil, dam and mine engineering; environmental consulting; geology and geophysics; hydrology and hydraulics; and construction engineering services.