Age: 26
Location: Falls Church, Va.
2007 Revenue: $7.5 million
Employees: 70
Founded: 2001
Website: www.k4solutions.com

Sumi Krishnan was just 19 years old when she entered the competitive federal contracting market. Today, her company regularly lands multimillion-dollar contracts to provide help desk support, network engineering support, video teleconferencing, and data management services for Air Force bases and other agencies, including the Pentagon. This summer, the company was awarded a contract to oversee office automation and military personnel administration support for the 88th Communications Group at the Wright-Patterson Air Force Base in Dayton, Ohio, one of the nation's largest military installations.