Key Personnel

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  • Key Personnel - Terry Donegan, P.E.
Terry Donegan, PE

Mechanical Plumbing Design and CS: Senior Mechanical Engineer & President


Terry Donegan, P.E. is the Senior Mechanical Engineer for D2 Engineering. Mr. Donegan has more than 30 years expereince designing and implementing Heating, Ventilating, and Air Conditioning systems, control systems, and energy conservation measures for commercial, industrial, and Mission Critical projects.

While performing Mechanical Engineering projects, Mr. Donegan also provided HVAC Commissioning, HVAC Troubleshooting, Design Reviews, Facility Surveys, Project Management, Construction Administration, Construction Inspection, Life Cycle Cost Analysis, and Energy Audits.

Mr. Donegan is a member of ASHRAE and the National Society of Professional Engineers (NSPE). He supports the community as a member of the Gaithersburg Rotary Club, where he serves as Treasurer. Mr. Donegan is an avid runner having participated in marathons and triathlete games.

MEP services MD
D2 Engineering