WR Systems Ltd., Norfolk, Virginia, is awarded a $49,999,996 indefinite-delivery/indefinite-quantity, performance-based contract with provisions for cost-plus-fixed-fee and firm-fixed-price task orders. The contract is for the procurement of positioning, navigation and timing engineering and in-service engineering agency support services. The services required include design development, systems integration, acquisition and prototype engineering, technical documentation, and integrated logistic support in order to support the Integrated Product Team. Work will be performed in Norfolk, Virginia, and is expected to be completed by October 2020. Fiscal 2018 other procurement (Navy) funds in the amount of $1,200 are obligated at the time of award and will not expire at the end of the current fiscal year. This contract was not competitively procured because this is a sole-source acquisition pursuant to the authority of 10 U.S. Code 2304(c)(1), one source or limited sources (Federal Acquisition Regulation 6.302-1(a)(2)(iii)(B)). Space and Naval Warfare Systems Center Atlantic, Charleston, South Carolina, is the contracting activity (N6523619D8001).