Robert (Bob) Coleman is the CEO and COO of Six3 Systems, founded in April 2009 in partnership with GTCR. Before the formation of Six3 Systems, Mr. Coleman served as the President and COO of ManTech International (“ManTech”) from September 2004 to March 2009. Prior to his tenure with ManTech, he was the CEO and President of Integrated Data Systems (“IDS”), a highly regarded provider of software engineering, computer security and enterprise architecture solutions to the intelligence community and the Department of Defense. IDS, founded by Mr. Coleman in 1990, was acquired by ManTech in February 2003. Earlier career highlights include his tenure at the White House National Security Council Crisis Management Center during the Reagan and Bush I administrations, where he led the development of systems to assist in the collection and dissemination of critical intelligence data. Mr. Coleman has additional experience supporting national security efforts while working for SAIC and Raytheon Technical Services.