The Naval Air Warfare Center Aircraft Division plans to award a sole source contract modification to Sierra Nevada Company (SNC) in Colorado Springs, CO, for repair, maintenance, and sustainment support of VAMPIRE c-UAS systems for the Ukraine Navy. Services include engineering, technical assistance, and field support for systems deployed in Eastern Europe by NATO. Work will be performed both in the Continental United States and Outside the Continental United States in support of the Ukraine Navy. No budget amounts or submission timelines are specified. This notice is for informational purposes only and is not a request for competitive proposals.