Raytheon Co., Tucson, Ariz., is being awarded $29,952,221 cost-plus-fixed-fee modification to previously awarded contract (N00024-10-C-5432) for fiscal 2012 design agent engineering services for the MK-31 rolling airframe missile guided missile weapon system. The MK-31 rolling airframe missile guided missile weapon system is a cooperative development and production program conducted jointly by the United States and the Federal Republic of Germany under memoranda of understanding. The support procured under this contract is required to maintain current weapon system capability, as well as resolve issues through design, systems, software maintenance, reliability, maintainability, quality assurance and logistics engineering services. Work will be performed in Tucson, Ariz., and is expected to be completed by September 2012. Contract funds in the amount of $342,272 will expire at the end of the current fiscal year.