Los Angeles, CA 90012 • (38.7 miles) • Full Time • 8/31/2025

MANTECH seeks a mission-focused Cybersecurity System Security Engineer III to support Special Access Programs (SAPs) aligned with SSC and AFSPC acquisition initiatives.In this on-site role located in El Segundo, CA, you will work closely with security professionals to safeguard vital national security systems while ensuring compliance with NIST, DoD, and SAP cybersecurity frameworks.Responsibilities include but are not limited to:You will lead advanced system security engineering initiatives, helping ensure that acquisition systems meet security and accreditation requirements from design through deployment.Lead a team of System Security Engineers and Certification & Accreditation Analysts responsible for safeguarding U.S. and allied national security interests. Provide technical direction,