Local 537 represents more than 3,000 pipefitters, welders and HVAC technicians employed in the construction industry across Massachusetts. Members lead the way in providing installation, service, estimation, Computer Aided Drafting (CAD), supervision and management to projects of all shapes and sizes. We are committed to ensuring that our members bring the highest level of skills wherever they work, including the region’s medical campuses, universities and more.

At the heart of Local 537’s success is our five-year training program. Our curriculum teaches apprentices the right way to be a professional, from the most basic approaches to the latest cutting-edge technology. They graduate with careers and great benefits and are consistently ranked among the top piping professionals in the world. Local 537 pipefitters, welders and HVAC technicians also further their education to maintain the highest standards of excellence and safety on the job.

Contractors and end users alike are confident that they are getting the best-trained workers in the industry. And at Local 537, our role in the community is more than a job — it’s a career that provides benefit to the society we live in.

Watch to learn more about our mission, workforce, and projects.



To learn more about Local 537 services and our contractors, visit our directory or fill out the below form to connect with one of our Business Agents.