Space Ground Systems Solutions LLC, West Melbourne, Florida, is awarded a $19,729,508 modification for task order N00173-17-F-6203 under previously awarded indefinite-delivery/indefinite-quantity contract N00173-15-D-2015 for spacecraft engineering, software, research and development services to the Naval Center for Space Technology. Work will be performed at the Naval Research Laboratory, Washington, District of Columbia (50 percent); and Space Ground Systems Solutions LLC, Melbourne, Florida (50 percent), and is expected to be competed July 1, 2020. Fiscal 2019 research, development, test and evaluation (Navy) funds in the amount of $1,796,029 will be obligated at the time of award. These funds will expire at the end of the current fiscal year. The Naval Research Laboratory, Washington, District of Columbia, is the contracting activity.