Founded in 1979, EESI provides cost-effective mechanical, electrical, and control engineering services, with a special emphasis in assessments, building systems remodel or renovation design, commissioning, and energy upgrades. Our team has the expertise required to provide efficient, low maintenance building system designs which provide safe and comfortable environments. With our main office centrally located in Corvallis and branch offices in Portland and Helix, we serve clients large and small throughout the Pacific Northwest. EESI is personalized enough for small projects, yet structured to handle large design and construction management projects.