The Best Energy sector leader in Maryland

United Petroleum is a well-established institution located at 890 Pennsylvania Avenue in Hagerstown, Maryland. As a one-stop destination for all your car repair and fueling needs, United Petroleum offers top-notch services to ensure your vehicle runs smoothly and efficiently. Whether you need a quick oil change, tire rotation, or simply need to fill up your tank, our team of experienced professionals is here to provide exceptional service. Visit us today and experience the convenience and quality that United Petroleum has to offer.

General & Mechanical Services (GMS) is a trusted institution located at 1007 Skidmore Drive in Annapolis, Maryland, United States. Specializing in general contracting and plumbing services, GMS has been a leader in designing, building, and maintaining mission critical HVAC, mechanical, plumbing, and electrical systems since 1998. With a team of professional and certified contractors, GMS offers a range of services including design, repair, retrofit, and maintenance for properties in Maryland, Virginia, DC, Delaware, and Pennsylvania. Clients in education, healthcare, commercial, and government sectors rely on GMS for their HVAC, mechanical, electrical, and plumbing needs.