Leading Multi-Trades Mechanical Contractor M&M Welding is your one stop shop for all your mechanical construction needs Our Services 24/7 Emergency Service Any time of the day or night, our team of experienced professionals are only a phone call away Contact Us See Our Latest Work We have a long history of quality work product and satisfied customers. See what we've been up to lately Clients

Welding Services

Trusted for Over 45 Years in MD, VA, and DC

M&M Welding and Fabricators, Inc. has been providing all phases of mechanical construction for the past 45+ years to the Maryland, Virginia, and Washington, DC areas. We are a complete turnkey, woman-owned, and MDOT Certified Multi-Trade Mechanical Contractors that has proudly served its clients since April of 1972. From professional welding services to needing an HVAC mechanical contractor or welders near you, we have you covered.


Our team understands that with mechanical contracting jobs you can’t afford to have a company come in and complete a job ineffectually – the stakes are too large and the time commitment too long.


In order to utilize your days and dollars properly, our crew completes every job with effective financial and operational aspects in mind, so you don’t ever need to worry the job won’t be completed right the first time.


Trust us for mechanical contractors needs. With 45+ years of success in the industry, we can complete your large job with reliability, security, and unbeatable expertise.


You can trust us as the outside vendors that work to the same standards and ethics that you expect from your internal employees — we are on time, in budget, and the top experts in our field.

Some of Our Mechanical Contracting Services at a Glance

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Certificates of Authorizations

“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)

Professional Welding Services

Get to Know Our Commercial Mechanical Contractors & Welding Services Near You

M&M Welding Management TeamAll heating and cooling needs are covered by experienced employees at M&M Welding and Fabricators. We are ASME-certified, unionized, and a multi-trades company with professional welding services.


M&M Welding and Fabricators is one of the best welding companies near you. We provide code, X-ray, aluminum welding service, etc. And the majority of our employees have been part of our company for over a decade, both on the field and in the office, while some have been around for over three decades with M&M Welding and Fabricators. Call us for Welding Services Near You!


Part of our professional welding services includes always providing 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.


Mechanical Companies Near You

We’re one of the best mechanical companies near you, who will not keep you guessing and in the dark; instead, we have specialized experience to always have you satisfied and ready for the next step, so you feel confident.

Commercial Mechanical Contractors

Reliable Equipment is Part of Our Service Promise

M&M Crane and Heavy EquipmentM&M Welding and Fabricators owns, operates, and services all of its own fully up-to-date collection of construction equipment. With our commercial mechanical contractors, you will never face delays or pay the high price for third-party equipment rentals.


From professional welding services to needing HVAC mechanical contractors and beyond we can supply the tools, experience, and equipment needed.


We haven’t been the requested commercial mechanical contractors for highly complex jobs by coincidence — we’ve proven ourselves time and time again with the right attitude, right approach, and right results.

Mechanical Contractors Serving Complex Government Jobs to Local Schools

Just a few of our mechanical contracting jobs have included complete boiler heating plant renovations, boiler installation and rehabilitations, to working within the White House Complex, deep in the 7-mile network of tunnels underneath the District.


When you need mechanical contractors in your area, call upon us to provide excellent service that exceeds your expectations. With our mechanical contractors, fabricators, professional welders near Maryland and more, you will wonder why you did not begin your professional welding service sooner.

Just a Few of Our Clients

department of defense
montgomery college
State Highway Admin
Washington County Public Schools