While working for 20 years in various management roles at General Electric and Mars, Inc., John maintained a passion for real estate and residential building construction. In 2001 he founded Caledonia Renovations, a custom homebuilding and renovation contracting company, which makes use of energy efficient building techniques combined with the best building practices. Caledonia Renovations is now the Contracting & Renovations division of Orange Energy Solutions.  John is a Building Performance Institute (BPI) certified building analyst, a certified Green Advantage Construction Professional, Lead Paint Renovation Certified and a Residential Energy Services Network (RESNET) trained professional. He holds a Master’s degree in Organizational Development from the University of Pennsylvania.