**ManTech** is actively seeking a motivated, customer oriented **Cybersecurity System Security Engineer III** to join our team in the **El Segundo, CA** . The Cybersecurity System Security Engineer’s primary function is working within Special Access Programs (SAPs) supporting SMC and AFSPC acquisition programs. The position will provide “day-to-day” support for Collateral, Sensitive Compartmented Information (SCI) and Special Access Program (SAP) activities to meet NIST Cybersecurity requirements for system assessment & authorization. Performance shall include: + Lead a team of System Security Engineers and Certification and Accreditation Analysts responsible for ensuring the customer’s national and international security interests are protected as acquisition systems are designed and tested. + Chair and or Co-Chair customer and SAP community Cybersecurity working groups, participate in SSE IPT reviews. + Perform oversight of the development, implementation, and evaluation of information system security program policy; special emphasis placed upon integration of existing SAP network infrastructures. + Review SSE related designs and provides security compliance recommendations. + Develop and provide Cybersecurity risk management recommendations to the customer. + Provide SSE support for Mission and Training systems design and development. + Represent the Government Program Manager in various SSE related working groups, advisory groups, and advisory council meetings. **Basic Qualifications:** + Bachelor’s degree in a related discipline or additional 4 years of related experience may be accepted in lieu of degree. + 12+ years total experience. + 8+ years experience with SCI or SAR environment. + 4+ years of SAP relevant experience. + 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. + Must be familiar with security policy/manuals and the appropriate ICDs/JAFANs/DOD Manuals and other guiding policy documents. + Full understanding of Risk Management Framework (RMF) and Joint SAP Implementation Guide (JSIG) processes for system accreditation, along with legacy (DITSCAP, DIACAP) processes. **Security Clearance Requirements:** + Current Top Secret Clearance with SCI Eligibility + Eligibility for access to Special Access Program Information + Willingness to submit to a polygraph. **Preferred Requirements:** + Must have the ability to work in a dynamic environment and effectively interact with numerous DOD, military/civilian personnel and industry partners. + Working knowledge of Microsoft Office (Word, PowerPoint, and Excel) + CISSP Recommended. + Willingness to travel within the organizational Area of Responsibility (AOR) (note - could be extensive, and will include both air and ground transportation) ManTech International Corporation, as well as its subsidiaries proactively fulfills its role as an equal opportunity employer. We do not discriminate against any employee or applicant for employment. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or status as a protected veteran. If you are a qualified individual with a disability and require a reasonable accommodation to apply for a position with ManTech through its online applicant system, please email us at careers@mantech.com and provide your name and contact information.