David Scheer is an Architect, builder, software developer and energy modeling expert. David founded RetroEta Inc in 2016 to develop tools that support rapid energy, solar, and daylighting design, and rapid assessment of retrofit opportunities for large scale portfolios. Previously he has served as a domain expert and Special Projects Manager with the Autodesk Building Performance Analysis group, as CTO of PlanIT Impact, and as an Associate with Loisos + Ubbelohde Associates. David has also worked in land planning and GIS research, and as a contractor, fisherman, and float plane pilot in California and Alaska. David lives in a zero energy home he designed and built in San Francisco.