Sean Armstrong is the Managing Principal of Redwood Energy and has worked for 28 years in building electrification, designed the retrofit and new construction of more than 25,000 all-electric residences for disadvantaged populations, co-authored 7 "pocket guides" to building electrification, provided legal and technical support to building gas bans nationwide, and has received Grand Prize awards from the United Nations and the California Building Industry Association. Sean was inducted into California's Clean Energy Hall of Fame in 2022, and in 2023-2024 is working with other nations on their Net Zero goals on behalf of the U.S. State Department.