Apprentices in Pipefitters Local 537 learn their trade in a brand new, modern training center that is the envy of all training centers in Boston and nationally. The state-of-the-art 70,000-square-foot building, which opened in 2019, includes classrooms, more than 80 welding bays and ample space to train future pipefitters.

Apprentices “earn while they learn,” working in the field on a graduated wage scale while receiving instruction in the evenings. After completing the five-year training program, they graduate with jobs, great benefits and no debt.

With over 3,000 members and growing, Local 537 has consistently strived to improve the way people live and work, from training programs to job productivity and safety.

Learn more about our core standards below:

Our Training Principles



Protecting the lives of Local 537 members on the job site is the number one priority. Each day, we practice this through programs that implement safety issues in the workplace, including workers’ rights, job hazards, protection against chemicals, equipment and dangerous work practice and recognition of safety and health officials at each job site. Local 537 also offers continued education to keep our members up to date with the latest safety standards. In prioritizing the top safety standards, Pipefitters Local 537 also ensures the public’s safety during the construction and servicing of its projects.



Our mission is simple: we do the job right, the first time, and every time. We implement a wide variety of measures every day – from innovative technology to enhanced processes – to improve productivity. Statistics show that union jobs are nearly 17 percent more productive on average than open/merit shops in the USA. A five-year apprentice program ensures you will be mentored with time-proven techniques in all aspects of the work. Training you to be cost effective and productive in your career ensures both your longevity and ours. Pipefitters Local 537 also offers continued training and welding certification classes to keep our members current with all industry advancements.

Pipefitters taking an exam


At Pipefitters Local 537, our members are our greatest assets. For this reason the UA has been investing in programs to train the most qualified workers in the United States for over a century. No other organization serves the training needs of the piping industry like the United Association. Training is our investment in you.

Our Staff

  • Paul McGrath, Training Coordinator

  • Christine Harkins, Administrative Assistant

For questions regarding apprenticeship applications, please email or call 617-825-3777.

Would you like more information on our training program?

The recruitment, selection, employment, and training of apprentices during their apprenticeship shall be without discrimination based on race, color, religion, national origin, or sex. The Sponsor will take affirmative action to provide equal opportunity in apprenticeship and will operate the apprenticeship program as required under Title 29 of the Code of Federal Regulations, Part 30, as amended and 453 Code of Massachusetts Regulations §7.04(b)(21).