Federal & Defense

Portsmouth Naval Shipyard

Since 1982, RTH Mechanical Contractors has completed numerous mechanical, plumbing, and infrastructure projects across multiple buildings and facilities at Portsmouth Naval Shipyard. Our team has supported a wide range of upgrades, repairs, and system improvements throughout the shipyard, including HVAC systems, plumbing infrastructure, energy improvements, equipment replacements, and critical facility support work within an active naval installation.

U.S. Air Force Facilities

RTH has performed mechanical system upgrades and facility improvement projects at Air Force installations in the region. Our work has included renovations, specialized equipment support, and mechanical infrastructure improvements within operational military facilities.

U.S. Coast Guard Facilities

RTH Mechanical Contractors has provided plumbing, mechanical, and infrastructure services for U.S. Coast Guard facilities, including utility repairs, sewer system upgrades, and mechanical improvements supporting operational base facilities.

Federal Aviation Administration Facilities

Our team has completed HVAC and mechanical upgrades within FAA facilities responsible for air traffic control operations, performing system replacements and improvements in highly sensitive, mission-critical environments requiring careful coordination and compliance.