Triad, established in 1975 is a full-service engineering firm specializing in the areas of civil, geotechnical, environmental, and mining engineering. The company is located in Winchester, Va., and has offices in West Virginia, Pennsylvania, and Maryland. It provides construction and design services for commercial and industrial site developments, such as landslide and dam repair, landfills, and abandoned airport developments. It also offers services in geotechnical projects, including investigations for communication towers, storage tanks, coal and mineral processing and waste management facilities, bridges, highways, hospitals, and schools. It provides environmental engineering services, such as assessment for property transactions, underground storage tanks, environmental compliance, groundwater consulting, and wetland permitting and design. The firm s laboratory is certified by the U. S. Army Corps of Engineers and provides testing for asphalt, soil and rock samples. The company also offers surveying and mapping services by registered professional engineers and licensed land surveyors.