Join a team built by engineers.
M3 Mechanical is a design-build commercial HVAC contractor headquartered in Southern California, delivering projects across the country. We're always looking for good technicians, project managers, estimators, and engineers.
Apply NowWhat sets working here apart
We build teams the way we build systems — for reliability, scale, and long-term performance.
Design-build depth
Our teams work on the full lifecycle — design, install, service — not just a slice.
Real projects, real scale
Commercial, industrial, retail, banking, multi-family, and warehouse work across the country.
Learn from veterans
Our leadership averages 20+ years of direct HVAC field and engineering experience.
Safety first, always
A culture that treats every job like every technician is going home whole at the end of it.
Apply Now
Fill out the form below. Upload a resume if you have one — you can leave it blank and we'll follow up if the fit is right.
Ready to optimize your facility's climate?
Whether you need urgent repairs or are planning a new construction project, our team is ready to deploy.