About Us


Hesnor Engineering Associates, PLLC is a mechanical, electrical and plumbing (M/E/P) engineering firm with offices in Albany, NY and Adams, MA. Since 1992, owners of heavy industrial, research and mission critical facilities have trusted us to provide the specialized M/E/P services necessary for their facilities to operate at their peaks. 

As we evolved, we have applied this experience to projects in the indoor agricultural, educational, institutional, commercial, multi-family and public sectors to cost-effectively enhance design concepts and maximize returns on owner investments.

Notably, much of our work takes place in occupied buildings, so we have deep experience in developing phasing plans that minimize impacts on facility operations.


Most firms spend a lot of time talking about their client service philosophy. Ours is simple: we assess each project independently, deliver fundamentally sound designs, and implement them responsively and responsibly.

Our approach is rooted in decades of working directly for facility owners. With HEA, you will have 24/7 access to facilities engineers with deep M/E/P and building utilities expertise. As we like to tell our clients, we are “on your bench,” available for support whenever you need us.

Current Public Sector M/E/P Engineering Term Agreements:


Massachusetts: DOS, DCAMM, DHCD


TJ Hesnor

TJ Hesnor, PE


The managing partner of HEA’s New York office, TJ has over 25 years’ experience with industrial, commercial, healthcare, institutional, multi-family, educational, and mission critical facilities. He has extensive knowledge of building utilities as well as HVAC, temperature control and energy management, plumbing, process utility, fire protection, and other mechanical and electrical systems. TJ is often called upon by HEA’s clients for his expertise in energy consulting, capital planning and equipment specification.

Mike Trzcinsk

Mike Trzcinski, PE, CPD, LEED AP


A LEED-Accredited Professional, Mike takes special interest in the sustainable design of buildings. He is very familiar with the design, construction and commissioning of M/E/P and FP systems for a wide variety of laboratories, buildings and facilities in the healthcare, commercial, industrial, multi-family, educational and controlled environment agricultural (CEA) sectors. He has two decades of experience and is the managing partner of HEA’s Massachusetts office.