A.J. Monier – San Antonio's Finest Mechanical Contracting Firm

What We Do

A.J. Monier brings more than a century of experience to the mechanical construction and service industry in the South TX area.

Sheetmetal & Specialty Fabrication

M & M Metals is San Antonio’s leading manufacturer of precision metal fabrications. Established in 1975 our facility has expanded to include the latest in manufacturing and programming equipment.

BAS / Controls

A.J. Monier is more than just a mechanical contractor – we’re ready to help leverage technology to make your building more efficient, more reliable, and easier to control. As

Service

A.J. Monier is committed to providing around-the-clock support to our customers. Our trained technicians are available 24 hours a day, seven days a week for all types of mechanical

A.J. Monier is a full service mechanical contractor that can add value to large, out-of-the-ground, and design-build mechanical construction projects. We’ve hit budget and timelines time and time again.

Piping & Plumbing Fabrication

Nothing accelerates a project timeline or preserves a project budget like prefabrication. We boast the strongest prefabrication capabilities in the area, working on everything from thin stainless tubing, to

What Our Clients Say About Us

Here are some recent client testimonials that show the kind of results we deliver every time.

Plumbing Service Group Client

I was very impressed with his explanation of the repair that needs to be made and his professionalism. It’s very hard nowadays to find valuable people not only to work for you but to represent your company with the upmost respect and integrity.

Controls Group Client

We don’t want anyone touching our buildings but A.J. Monier Controls group. We can count on them to help troubleshoot any automation issues we have at our buildings.

HVAC Group Client

The installation for the RTU at the Annex building turned out really clean and it is working good. Your guys did a great job! Thanks for all your help.

Why We're a Great Company to Work For

A.J. Monier has been a family company for the past hundred years. Since then, you could say that our family has grown! We work hard to maintain a family feel with people all across our organization.

Honesty

Being straightforward and honest is how we work internally and externally. Our employees are honest with each other and management checks in often.

Teamwork

We depend on each other every day, and use a team-oriented approach to solve whatever problem comes our way. No job is too big or small, we can do it together.

We Care

We care about our clients, our employees, each other, and our communities. Anyone who cares like we do - we want to talk to you!