The Missile Defense Agency (MDA) of the Department of Defense is planning to modify Contract HQ085121C0002 with Lockheed Martin (LM) Corporation to extend their role as the Aegis Ballistic Missile Defense (BMD) Combat System Engineering Agent (CSEA) for up to one year. This contract modification will enable LM to continue providing essential engineering and technical support for the Aegis BMD Weapons System, including the development, integration, testing, and sustainment of capabilities for Aegis Cruisers, Destroyers, and the Aegis Ashore Missile Defense System. Given LM's extensive experience and unique technical knowledge of the Aegis system since its inception in 1969, the MDA intends to solicit and negotiate with only this source under the authority of 10 U.S.C. 3204(a)(1). Interested parties who believe they can meet the requirements without incurring substantial duplication of costs are invited to submit a capability statement to the primary contact, Derek Tenney, at derek.tenney@mda.mil, by the specified response date.