The Department of Defense, through the Naval Air Systems Command (NAVAIR), intends to award a sole source delivery order to Northrop Grumman Systems Corporation – Aerospace Systems (NGAS) for the MQ-4C program. This procurement involves a recurring engineering retrofit effort to incorporate multiple Engineering Change Proposals (ECPs) into fielded aircraft, supporting both the United States Navy and the Royal Australian Air Force. As the sole designer and manufacturer of the MQ-4C Triton Unmanned Aircraft System, NGAS possesses the unique expertise and technical data necessary to fulfill the government's requirements within the established cost and schedule constraints. Interested parties seeking subcontracting opportunities should contact Vicky Harper-Hall at Northrop Grumman via email or phone, as this notice does not constitute a request for proposals and no contract will be awarded based on offers received.