GMS: Making The Right Things Happen – Correctly and Promptly

GMS: Commercial HVAC, Mechanical, Electrical & Plumbing for the Mid-Atlantic

General & Mechanical Services (GMS) Maryland is a mission-critical mechanical, electrical and plumbing services company. Our primary vertical markets served are health care, commercial businesses, GSA-authorized buyers and data centers for all markets. Our primary customers are the owners of the facilities within the above markets.

GMS is considered a leading mission-critical infrastructure company serving primarily the Mid-Atlantic region, with customers spanning the globe. GMS can service your commercial HVAC in Maryland, Pennsylvania, Delaware, Virginia, West Virginia and Washington DC as well as commercial electrical and plumbing in Maryland and other Mid-Atlantic states. GMS is not a company concerned with creating a slogan or cliché to describe ourselves, we just make the right things happen – correctly and promptly!  More »

Hvac Tune-up*

Call Now!

  • Keep your system efficient & lower energy bills
  • Reduce the need for costly repairs
  • Extend the life of your equipment

Sign up for a commercial maintenance agreement today to earn your free HVAC tune-up*

* includes one free AC unit tune-up per commercial customer. Additional units can be serviced as part of this offer - contact us for information

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 »



Data Center Power & Cooling

Data Center Power & Cooling

Take the first step towards reducing data center energy costs... More »


Reduce Operating Costs, Save Energy

Take advantage of current energy rebate and incentive programs being run through local utilities... More »


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