The Department of Defense, through the Naval Information Warfare Center (NIWC) Pacific, is issuing a Request for Proposal (RFP) No. N66001-25-R-0011 for User Experience/User Interface (UX/UI) design and engineering services. The objective is to enhance the development of Command, Controls, Communications, Intelligence, Surveillance, and Reconnaissance (C4ISR) systems and products, focusing on human factors throughout the product lifecycle. This procurement is critical for ensuring effective user interactions with complex systems, adhering to established UX/UI standards. Interested parties should direct inquiries to Contract Specialist Magda V. Velarde at magda.v.velarde.civ@us.navy.mil by November 6, 2024, with the contract expected to be awarded as a single indefinite-delivery, indefinite quantity (IDIQ) contract over a five-year period.