Tackling climate change one building at a time.
Building relationships with architects, owners, and developers in an interdisciplinary and collaborative way.
Petersen Engineering was founded in 1992 to advance sustainability, occupant health and comfort, resiliency, and affordability in the built environment. In September 2026, Petersen Engineering joined SMRT Architects & Engineers, an integrated architecture and engineering firm founded in 1884 and headquartered in Portland, Maine, bringing expanded resources to our high-performance Passive House and MEP/FP engineering work while our team, projects, and commitment to sustainable design remain the same. We are a mission-driven engineering firm with a holistic, forward-thinking approach to helping clients create high-performance, sustainable projects. Since our founding, we have designed HVAC, electrical, fire protection, and plumbing systems for buildings of increasing size and complexity, building expertise in high-performance standards including LEED, net zero, and Passive House. Our vision is to lead the Northeast in high-performance MEP/FP engineering, measured by the buildings we help certify and the carbon they avoid.