The UI/UX Designer role involves creating user-centric designs to enhance usability across multiple applications, ensuring consistency and innovation. Responsibilities include developing mockups, conducting user interviews, collaborating with stakeholders, iterating designs, and monitoring analytics for continuous improvement. Candidates need a BS in Design or related field, 3+ years of experience, proficiency in design tools, and the ability to obtain a security clearance. The position requires on-site work in Norco, CA, with up to 10% travel, and is open to U.S. Citizens. Preferred skills include knowledge of front-end technologies, accessibility standards, and Agile methodologies. The role offers a competitive salary range, comprehensive benefits, and opportunities for growth within a mission-driven environment.