GTCR Golder Rauner-backed Six3 Systems has added on Novii Design, a provider of large scale data fusion systems, cyber solutions and high-end enterprise architectures to the Intelligence Community. The acquired company was advised by KippsDeSanto & Co. and Cooley on the deal, while Six3 was legally advised by Kirkland & Ellis. GTCR formed Six3 in partnership with Robert Coleman in April 2009. Novii represents Six3's third add-on.