ANTEON Corp., Fairfax, Va., is being awarded an $11,857,391 modification to a previously awarded cost-plus-award-fee, indefinite-delivery/indefinite-quantity contract (N00421-00-D-0328) to exercise an option for approximately 249,600 hours of maintenance planning and design interface technical/management support services for the Naval Air Depot (NAVAIRDEP), Jacksonville, Fla. These services include evaluating initial designs, evaluating proposed design changes, maintenance planning and sustaining maintenance plans. Work will be performed at NAVAIRDEP Jacksonville, Fla. (90 percent), and Oklahoma City, Okla. (10 percent), and is expected to be completed in September 2006. Contract funds will not expire at the end of the current fiscal year. The Naval Air Warfare Center Aircraft Division, Patuxent River, Md., is the contracting activity.