Certified Women-Owned Ship Building and Repairing in Virginia

We perform shipboard installations that support Hull, Mechanical & Electrical (HM&E) and Electronic systems. We support all classes of ships for the Navy, Army vessels, Coast Guard, MSC, NOAA and commercial craft.

Addon Services LLC is successfully executing IDIQ and JOC federal contracts within military bases. The projects include historic building renovation construction. Design Build construction encompassing a comprehensive list of Definable Features of Work including Mechanical, Electrical, Plumbing (MEP), HVAC, Piping, Ductwork, Roofing, Paving, Architectural, Infrastructure. Our customers were impressed with Addon’s successful completion of projects that they awarded us several contracts in the field of IT, Tech Pubs, Engineering & Professional support services.We are a distributer of UVSheltron UVC and Pure Air decontamination/disinfection products, PPE, masks, lab testing, medical and non-medical equipment sterilization, sanitization, bacteria/virus eradication.

TSTC provides the following capabilities: Program and Acquisition Management, Financial Management and Internal Control, Cybersecurity and Risk Management, and Intelligence and Analysis services.