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, policy alignment, and oversight during system design, development, and testing phases.
• Chair or co-chair cybersecurity working groups, represent the Government Program Manager in advisory bodies, and actively participate in SSE IPTs to ensure integration of security across SAP systems.
• Guide the development, implementation, and evaluation of cybersecurity policies. Oversee integration of SAP network infrastructures and provide expert-level consultation across all aspects of information security.
• Review and assess secure system designs, providing risk management recommendations to stakeholders. Ensure compliance with RMF, JSIG, and other relevant accreditation processes.
• Support Mission and Training system development with SSE expertise, including review of system architectures, test and evaluation events, and overall security engineering input throughout the acquisition lifecycle.
• Assist in the development and ongoing maintenance of Program Protection Plans and Cybersecurity Strategies. Support site activations and major security review events.
• Collaborate directly with accreditation authorities to guide systems toward Authorization to Operate (ATO), while managing documentation and continuous compliance throughout system operation.
   

Minimum Qualifications:

• Bachelor’s degree in a related discipline; An additional 4 years of related experience might be substituted for a degree
• 12 + years of relevant experience
• 8 + years supporting SCI or SAR environments
• Must meet position and certification requirements outlined in DoD Directive 8570.01-M for Information Assurance Technician Level 3 and Information Assurance Manager Level 3 within 6 months of the date of hire. CISSP Recommended.
• Strong understanding of RMF and JSIG accreditation processes, as well as legacy frameworks such as DITSCAP and DIACAP
   

Preferred Qualifications:

• Familiarity with key security directives including ICDs, JAFANs, and DoD Manuals
• 4 + years of SAP-relevant experience

Clearance Requirements:

• Current TS/SCI clearance
• Must be eligible for access to Special Access Programs.
• Willingness to submit to a Counterintelligence polygraph is required.
   

Physical Requirements:

• Willingness to travel within the organizational Area of Responsibility (AOR), including air and ground transport as needed
• Must be able to remain in a stationary position approximately 50% of the time using standard or adjustable desks/chairs in secure environments
• Occasionally required to move about the office to access safes, files, and technical equipment, and may assist with the installation or removal of computer components