DEI Consulting

DEI Consulting

The company was founded in 1991 and specializes in Building Commissioning, Retro-Commissioning, and

DEI is a professional consulting firm specializing in building commissioning, retro-commissioning, energy management, and facility assessments. We provide building owners and operators a high level of assurance that their installed systems are operating within the performance guidelines specified in the project construction documents and design intent. DEI’s keen knowledge of today's high-tech bui

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Our Story


DEI is a professional engineering firm specializing in building commissioning, retro-commissioning, and ‎energy management studies. We have been providing commissioning services since the early 1990s and we are proud to be veterans in this field. We are also an approved Federal Government contractor and are on the GSA’s Federal Supply ‎Schedule (GS21F0004U) for all our services.‎

DEI is fully certified by the AABC Commissioning Group (ACG) and has in-house licensed Professional Engineers and LEED accredited professionals. Most of our commissioning projects are performed with LEED certification as the client’s goal. Our engineers develop sustainable energy and ‎commissioning solutions and ensure ‎compliance with established building codes and ‎operational requirements. We pride ‎ourselves in providing environmentally sound and ‎innovative green consulting, ‎commissioning, and energy management services.‎

Our team provides innovative technical solutions to ‎optimize building operations. ‎We offer a full complement of energy and ‎commissioning services to make buildings work better and more efficiently. Lower building energy consumptions not only help our clients by reducing their facility operational costs, but also help our nation by protecting its natural resources.



Sterling, VA

Opening Hours

Monday 9am - 4pm
Tuesday 9am - 4pm
Wednesday 9am - 4pm
Thursday 9am - 4pm
Friday 9am - 4pm

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