J Allen Smith Design Build

Smith Mechanical offers a range of consulting, design and installation services to residential and commercial customers. The company provides heating, ventilating and air conditioning system installation services to companies, builders and contractors. It offers a variety of in-house engineering and production services. The company provides advanced computer technologies for service documentation and historical analysis. It offers 24-hour emergency assistance services. Smith Mechanical provides maintenance and repair services for air handlers, boilers, chillers and computer room environmental units. The company also offers maintenance services for cooling towers, packaging units and water pumps. In addition, it services ventilation systems and rooftop and split system units. Smith Mechanical manages a staff of supervisors, service technicians and support personnel.

Operational for more than 70 years, Absolute Underground is a general contracting company that specializes in trenching, vibratory plowing and missile boring services. It also offers pipe proofing and land boring services. The company provides directional boring services for landscapes, golf courses and parks. In addition, it sells trucks and equipment. Absolute Underground is located in Harmans, Md.