Stephen Dvorak obtained an Engineering degree from the University of Wisconsin-Madison and is a Professional Engineer. Stephen founded DVO, Inc., an environmental engineering firm. In 2001, DVO began installing its patented Two-Stage Linear Vortex anaerobic digester, which processes agriculture, food, food processing, and industrial organic waste streams. DVO is the nation's largest digester company, with over 100 digesters in 19 states, and international projects in Australia, Canada, Chile, China, Serbia, South Africa, and South Korea.