Mechanical Contractors & Welding Services

Trusted for Over 50 Years in MD, VA, and DC

M&M Welding and Fabricators, Inc. have been providing all phases of mechanical construction for the past 50+ years to the Maryland, Virginia, and Washington, DC areas. We are a complete turnkey, woman-owned, and MDOT Certified Multi-Trade Mechanical Contracting Company that has proudly served its clients since April of 1972. From professional mechanical contracting to quality welding services, we have you covered.

Trust us for all mechanical contracting needs. With 50+ years of success in the industry, we can complete your large or small job with reliability, efficiency, and unbeatable expertise. You can trust us to work to the highest levels of mechanical contracting standards and ethics — we are on time, on budget, and the top experts in our field.

Some of Our Mechanical Contracting Services at a Glance

Contact us now for a free quote on your project


“R” Repair Stamp | “PP” Pressure Piping | “H” Heating Boilers | “S” Assembly of Power Boilers | “U” Pressure Vessels.

Minority Certifications

Maryland Department of Transportation (MDOT MBE 03-386) | Washington Metropolitan Area Transit Authority (WMATA DBE 786) | Prince Georges County Government (11-7619) | Prince George’s County Public Schools (811)

Commercial Mechanical Contractors & Professional Welding Services Near You

All heating and cooling needs are covered by the experienced employees at M&M Welding and Fabricators. We are ASME-certified multi-trade mechanical contractors offering professional HVAC service, welding services, commercial HVAC services, and more.


M&M Welding and Fabricators is known as one of the best welding companies in the metro DC area. We provide ASME-code, X-ray, and R Stamp Welding or various other welding services. The majority of our employees have been part of our company for over a decade, both in the field and in the office. Some of our crew have been around for over three decades with M&M Welding and Fabricators.


We own, operate, and service our own fleet of construction equipment, including crane trucks, backhoes, skid steers, and dump trucks. We can supply the tools, experience, and equipment needed for any job.

Get In Touch With Us Today

Our operations team shares decades of experience in mechanical construction, and we are prepared to put that experience and problem-solving ability to use for you. You can expect prompt, competent answers and responses to any inquiries you have. With multiple in-house teams, we have members who know exactly what you need and can serve you without delay.


We haven’t been one of the most requested commercial mechanical contractors for highly complex jobs by coincidence — we’ve proven ourselves time and time again with the right attitude, the right approach, and the right results. Get in touch with M&M today – your mechanical contractors and industrial welders of choice.