Sean Armstrong has worked for 25 years in building electrification, designed the retrofit and new construction of more than 25,000 all-electric residences for disadvantaged populations, co-authored five practical guides to building electrification, provided legal and technical support to dozens of gas bans nationwide, helped develop the 2016, 2019, 2022, and 2025 Title 24 California Energy Codes, and has received sustainable design awards from the United Nations, the U.S. Department of Energy, and the SoCal Building Industry Association.