Raytheon Co., Tuscon, Arizona, is being awarded a $37,902,562 cost-plus-fixed-fee modification to previously-awarded contract N00024-16-C-5433 to exercise options in support of Evolved Sea Sparrow Missile (ESSM) design agent, in-service support and technical engineering support services. This contract is to procure ESSM technical engineering support services, design agent and in-service support for calendar years 2016-2020. These requirements support ESSM missile production. The ESSM program is an international cooperative effort to design, develop, test and procure ESSM missiles. The ESSM provides enhanced ship defense. Work will be performed in Tucson, Arizona, (91 percent); Hengelo OV, Netherlands (2 percent); Raufoss, Norway (2 percent); Ottobrunn, Germany (1 percent); Richmond, Australia (1 percent); and various places below one percent (3 percent), and is expected to be completed by December 2019. Fiscal 2019 other country; fiscal 2018 weapons procurement (Navy); fiscal 2019 research, development, test and evaluation (Navy); Foreign Military Sales; and fiscal 2019 operations and maintenance funding in the amount of $16,663,004 will be obligated at time of award, and funds in the amount of $208,225 will expire at the end of the current fiscal year. This is a sole-source contract pursuant to an international agreement between the U.S. and nine other countries. The Naval Sea Systems Command, Washington, District of Columbia, is the contracting activity.