Talk about a dirty job. Wastren Advantage, a waste-management company in Piketon, Ohio, specializes in cleaning up hazardous materials. Today, 200 of Wastren's 350 employees work at the Department of Energy's waste-processing center in Lenoir City, Tennessee. Shown here are Wastren employees using robotic arms to sort radioactive waste, including gloves and sample bottles contained in 26-inch-thick glass "hot cells." Wastren also handles waste from the Manhattan Project, the program that led to the development of the first atomic bomb, at this site. The $104.9 million business, founded by engineers Phil Grant and Dale Uhl in 1987, also offers environmental consulting and remediation services. "We're handling some of the most unique and interesting stuff man has made," says CEO Steve Moore.