Matthew E. Mullen bio picture

Matthew E. Mullen, P.E., BEAP, LEED® AP, CBCP

Vice President

Engineering & Design

Value Delivered

Matt is responsible for providing engineering support for all operating divisions and promoting NEMSI through industry associations and new business relationships.

He is also responsible for engineering support on energy efficiency improvement projects, design engineering for design-build projects, and building systems troubleshooting.


Matt joined NEMSI from Trane’s Connecticut sales office where he was the Director of Performance Contracting, responsible for energy analysis and sales of performance-based contracts. He also became overall sales manager.

Prior to that, Matt started and managed the Connecticut office for a Boston-based consulting engineering firm, and also worked as a mechanical and electrical engineer in the corporate design and construction group of Digital Equipment Corporation.

Matt has a Bachelor of Science in Mechanical Engineering (BSME) from the University of Arizona. He is a registered professional engineer in Connecticut, Massachusetts, New Hampshire, Rhode Island, and Vermont.

He has developed and presented half-day seminars on “Chilled Water Systems Optimization” and “Energy Code Updates” for the Connecticut Energy Efficiency Fund. Matt authored the article entitled “Beyond the Payback Paradigm” that appeared in the June 2005 ASHRAE Journal. He is an ASHRAE Certified Building Energy Assessment Professional (BEAP), a Leadership in Energy and Environmental Design (LEED) Accredited Professional, and a Certified Building Commissioning Professional (CBCP).

Matt’s professional affiliations include being a member and Current Chair (2021-2022) of the ASHRAE Technical Committee 7.3 Operation, Maintenance and Cost Management, helped draft the initial ASHRAE Guideline 32-2012 “Sustainable, High Performance Operations and Maintenance”, Past President of ASHRAE’s Connecticut Chapter in 2008-2009 (received Region 1 “Most Improved Chapter” Award).

Matt is currently President of the Connecticut Chapter of the Association of Energy Engineers. He served three years with the University of Hartford’s Construction Institute (CI) as Chairman of the Marketing Committee and was on the Institute’s Board of Advisors from 2006-2009. He was recently honored with an ASHRAE Distinguished Service Award for his many years of service to that society.

The Personal Side

Matt currently serves on the East Brookfield Planning Board and on the David Prouty High School Building Committee.