We've written before about DC Capital's NISC, it's platform for acquiring firms in the Defense and Government IT Services sector. Private Equity firm GTCR has its own platform called Six3 Systems, and together they just announced they will be acquiring Harding Security Associates (HSA). From the press release on Business Wire:

HSA is a leading provider of identity intelligence, forensics analysis and security services to the federal government. With more than 350 highly trained employees, HSA is at the forefront of the Department of Defense’s (“DoD”) biometric-enabled intelligence analysis and forensics mission. The Company also provides mission-critical intelligence and counter-intelligence training and security services to the DoD and key civilian agencies.