Roger Greenawalt's interest in geothermal energy began because of the house that his grandparents owned. A large Victorian brick farm house with many high windows, the house is difficult to heat in winter and cool in summer. Greenawalt began exploring ways to provide an energy efficient heating system for his home, and the company office located in a building nearby. With geothermal heating, a heat pump circulates water through piping placed in the soil. Soil temperature warms or cools the heat pump's refrigerant, harvesting existing heat, creating an energy efficient system.
Greenawalt is owner (with his wife Terri) of Sweet Meadow Farm Drainage, a company whose services include farm drainage, construction of soil and water conservation projects, oil and gas well site preparation and reclamation, pipeline installation and rehabilitation, and most recently, biofuel production. Greenawalt also farms approximately 250 acres of corn and soybeans.
Greenawalt is currently president of the Ohio Chapter of the Land Improvement Contractors of America, a professional nonprofit organization representing over 100 small business contractors operating throughout the state. A conservationist and agrarian, Greenawalt holds a degree in education and agriculture from The Ohio State University. Before beginning his drainage business, he taught agriculture at West Branch High School in Beloit, Ohio. He was a finalist for Equipment World and etrucker Contractor of the Year in 2007. Greenawalt served as Mayor of Beloit for 16 years, and currently serves on the Board of Public Affairs.