General Dynamics Advanced Information Systems Inc., through Digital System Resources Inc. of Fairfax, Va., is being awarded an $18,054,166 modification to a previously awarded contract (N00024-05-C-6244) for 118,072 additional engineering services hours in support of the development, field maintenance and modification of Photonics Mast Workstations (PMWs), which will be integrated into the Photonics Mast System. The contractor addresses analysis, testing, design and modifications required on the PMWs that are used to control and display imaging sensor data from the AN/BVS-1 Photonics Mast on Virginia-class submarines. Work will be performed in Fairfax (90 percent); in Pittsfield, Mass. (6 percent); and in Mystic, Conn. (4 percent), and is expected to be completed by August 2011. Contract funds will not expire at the end of the current fiscal year. The Naval Sea Systems Command in Washington is the contracting activity.General Dynamics Advanced Information Systems, based in Arlington, manufactures transformational mission solutions in command, control, communications, computers, intelligence, surveillance and reconnaissance. Customers include those in the defense, intelligence, and homeland security and defense communities. For more information, visit: www.gd-ais.com