CHICAGO–(BUSINESS WIRE)–Madison Dearborn Partners, LLC (“MDP”), a leading private equity firm based in Chicago, today announced that it has formed an executive partnership, which is branded MissionX, with former LGS Innovations (“LGS”) Chief Executive Officer Kevin Kelly and two other former LGS executives, Robert Gallegos and Chris McCall, who previously served as LGS’ Chief Operating Officer and Chief of Staff, respectively. MissionX and MDP’s Business & Government Software and Services