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Gregory Raffio, PE, LEED AP BD+C

Greg oversees business development and client relations, drawing upon two decades of navigating the technical and human side of complex energy systems and scenarios. He is driven by his passion to empower and guide Go’s clients and our community stakeholders as we collectively navigate decarbonization in an ever-shifting utility and geopolitical landscape. As a natural facilitator, Greg approaches each interaction with curiosity, honesty, and enthusiasm, seeking to share knowledge, to engage stakeholders, and connect people to resources.


Greg received his Bachelor of Mechanical Engineering and Master of Science in Mechanical Engineering from the University of Dayton, culminating in his thesis on the role of efficiency and renewable energy in a decarbonized society, focused on zero-energy buildings. He has authored or co-authored eleven technical papers in the fields of zero energy, energy efficiency and multi-site analysis.


Greg, a fan of Ultimate frisbee and coaching youth soccer, encourages staff and visitors to take a running or walking break each afternoon. You’d be surprised how many walking meetings we’ve had! He hosts a community-supported agriculture (CSA) drop-off at his home, providing easy year-round access to local produce to around 40 families. He’ll try to recruit you to the CSA and teach you about cooking if you ask about it! He also serves on the board of Red Oak Community School, which educates students through nature immersion and prepares them to be environmental stewards, champions of social justice, and advocates for themselves and others.

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