Established in 1982, ESA Energy Systems Associates, Inc., has provided professional Mechanical and Electrical engineering services and designs for more than 500 facilities around the country. For the past twenty seven years, most of the firm's design projects have been the direct result of Investment Grade Energy Audits developed by members of ESA's professional engineering staff.

As an author and presenter of seminars for Investment Grade Energy Audits sponsored by the Association of Energy Engineers, members of the ESA staff have presented conferences in the USAm Hungary, Korea, Hong Kong and Italy. ESA staff has also represented World Bank to provide technical assistance to ESCO agencies in three major cities in China.

ESA is also heavily involved in Energy Management/ Consulting and many other related fields.