Paul is an expert on building decarbonization working at the Massachusetts Department of Energy Resources, the state energy office, helping Massachusetts achieve its legal net-zero decarbonization mandates. In this role, Paul works with Massachusetts cities, towns, planners, developers, architects, and utilities to improve new and retrofitted buildings with a particular focus on building thermal performance. Recently, Paul co-led the team that updated Massachusetts building code to include a Passivehouse mandate for new multi-family residential buildings as well as thermal energy demand limits, air infiltration requirements, and thermal bridge mitigation requirements, for most commercial buildings, well above the current requirements of American model energy codes. Paul also teaches building decarbonization at Harvard University Extension School.  Paul is a Massachusetts licensed Professional Engineer and a graduate of Worcester Polytechnic Institute (BS, Civil Engineering) and the University of Massachusetts at Amherst (MS, Civil Engineering).