THD Contract Services LLC

Herman Goldner Company is a full-service mechanical construction company. The company's capabilities include computerized estimating; computer-aided drafting; installation; commissioning; building control systems; sanitary process piping; and pipe fabrication. Over the last several decades, its plumbing division grew from a construction-oriented group to a full-service plumbing operation. In the winter of 2005, Goldner was awarded eight cooling tower replacements in the Philadelphia area, several of which were for center city high-rise office buildings. High-profile projects include Tenn Penn Center and One Franklin Plaza. Herman Goldner Company is in Philadelphia.

Operational for more than 10 years, River Mechanical Incorporated specializes in mechanical construction services in the Tri-State area. It provides plumbing, heating, ventilation and air conditioning services. The company offers services to hospitals, universities, medical centers, parks, banks and schools. It designs and undertakes commercial and industrial projects. River Mechanical Incorporated is located in Glenolden, Pa.