DC Capital Partners has entered into an agreement to sell National Interest Security to I.B.M. NIS owns and operates a group of companies engaged in providing information technology, information management and management technology consulting services to the U.S. intelligence community and other government agencies. The investment was DC Capital's first after being founded in 2007 by Thomas Campbell. Now it is DC's first exit as well. A good exit at that, earning the firm $180 million and generating a 9x return on its original investment, according to a source.