Diamond Mechanical Inc.



Our mission is to provide exceptional service to our customers at all times.

Diamond Mechanical, Inc. is founded on our commitment to treat each customer with honesty and respect.


About Us

What's the Diamond Difference?

Diamond Mechanical, Inc., established in 2017, is a licensed mechanical contractor specializing in commercial and industrial HVAC/R. We have over 17 years of combined experience as an HVAC/R service provider.

We are committed to providing exceptional customer service. Emergency service is available by calling (339) 469-1478. Our expert technicians are available 24/7. 

24/7 Service

We are available for emergency service 24/7. Contact us at  (339) 469-1478.

Brian Gerrior, Jr., Owner

Owner Brian Gerrior, Jr. established Diamond Mechanical, Inc. in August 2017. Brian is a 3rd generation member of the Pipefitters Local Union 537, with over 15 years of HVAC/R experience. He specializes in system solutions, merging controls, heavy equipment and all aspects of HVAC/R. While Brian started Diamond Mechanical as the only employee, he grew the company to 8 full time employees in just two years.

Brian's previous experience includes service, maintenance and construction projects at a Boston hospital; 4,000 ton chilled water plants; steam systems; MRI chillers; building automation systems and much more. His trusted business relationships are the source of Diamond Mechanical's customer base, which continues to grow each year.

Brian resides in Hanover, MA with his wife Shayla and their two beautiful children. They are expecting a daughter in February 2020.


Left to right:  Peter Gerrior (Uncle), Brian Gerrior, Sr. (Father), Joseph Gerrior (Grandfather)

All retired Local 537