GMS: Making The Right Things Happen – Correctly and Promptly


At General and Mechanical Services (GMS) of Maryland, we don’t manufacture our own products. This gives us the ability to remain vendor neutral and ensures we provide open and honest advice when it comes to choosing a solution that works for our customers. As a result of this, we have been chosen over some of our larger competitors to work with a number of marquee companies and government organizations nationwide to build and service their mission-critical infrastructure systems.

We do, however, maintain ongoing partner relationships with specific manufacturers so we can continue to provide the best possible prices to our customers.


American Standard Heating & Air Conditioning

APC by Schneider Electric

State Industries, Inc.

UVDI - UltraViolet Devices, Inc.

Kohler Rental



Chesapeake Mission Critical







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HVAC Venting - GMS Blog

GMS has created a Blog page - HVAC Venting where we hope to share thoughts and ideas with others in the industry or with those looking for answers to HVAC or mechanical infrastructure issues. Take a look and please feel free to share your thoughts and or comments with us. We'll also try and answer any questions you leave on HVAC Venting

New HVAC System Brings Peace & Quiet to School

GMS Awarded Contract for new GSA Contracting Vehicle - the Building Maintenance & Operations Strategic Sourcing






24 Hour Emergency Services

At GMS, we not only focus on long-term preventative care; we also handle emergencies. More »