STEPHEN A. ROOSA, Ph.D., is an account executive with a leading energy sevices company in Louisville, KY. He has over 25 years’ experience in commercial energy management and performance contracting. He is considered internationally to be an expert in energy conservation, energy management, and urban sustainability. Past experience includes energy studies for over 3,500 buildings with over $50 million in energy conservation and management projects developed for various customers. Dr. Roosa is a Certified Sustainable Development Professional, Certified Energy Manager, a Certified Indoor Air Quality Professional, a Certified Measurement & Verification Professional, a Certified Energy Monitoring and Control System Designer, a Certified Demand Side Management Specialist, a Certified Building Energy Management Professional, and a LEED Accredited Professional. He holds a Ph.D. from the University of Louisville in Planning and Urban Development, and his dissertation concerned sustainable development policies for urban environments.