{"id":3182730,"url":"https://alion.io/job/mantech-cyber-system-security-engineer-2","title":"Cyber System Security Engineer","company":{"id":179527,"name":"ManTech","domain":"mantech.com","url":"https://alion.io/company/mantech","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Avature","truth_index":{"grade":"A","score":100,"open_postings":86,"ghost_share":0,"stale_share":0,"repost_share":0.012,"time_to_fill_p50_days":12,"computed_at":"2026-10-26T05:57:25Z"}},"role":"Security","role_family":"Security","seniority":"staff","employment_type":null,"work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["El Segundo, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":179300,"max":318400,"currency":"USD","period":"year","gross":null,"usd_annual":318400},"salary_estimate":null,"experience_years_min":12,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"IAM","optional":false},{"name":"Microsoft Office","optional":true}],"status":"live","first_seen_at":"2026-10-23T22:06:37Z","employer_posted_date":"2026-10-23","last_verified_at":"2026-10-26T23:43:36Z","board_verified":true,"closed_at":null,"days_open":3,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":3},"description":"Shape the future of defense with MANTECH! Join a team dedicated to safeguarding our nation through advanced tech and innovative solutions. Since 1968, we’ve been a trusted partner to the Department of Defense, delivering cutting-edge projects that make a real impact. Dive into exciting opportunities in Cybersecurity, IT, Data Analytics and more. Propel your career forward and be part of something extraordinary. Your journey starts now-protect and innovate with MANTECH!\nMANTECH seeks a motivated, career and customer-oriented Cybersecurity System Security Engineer (CSSE) - III to join our team in El Segundo, CA.\nIn this role, you will provide critical support within Special Access Programs (SAPs) supporting SSC and AFSPC acquisition programs. You will deliver daily technical support across Collateral, Sensitive Compartmented Information (SCI), and SAP activities to ensure systems meet essential NIST Cybersecurity requirements for system assessment and authorization in a full-time, on-site environment.\nResponsibilities\nLead a team of System Security Engineers and Certification Analysts ensuring customer national and international security interests are protected during acquisition system design and testing.\nChair and co-chair customer and SAP community Cybersecurity working groups while actively participating in Systems Security Engineering IPT reviews.\nPerform oversight for the development, implementation, and evaluation of information system security program policies with emphasis on SAP network infrastructures.\nProvide expert-level consultation and technical services on all aspects of Information Security and system designs.\nDevelop and provide Cybersecurity risk management recommendations, Program Protection Plans, and Cybersecurity Strategies to the customer.\nAssist with site activation activities, design reviews, and test and evaluation of systems.\nWork directly with approval and accreditation authorities to successfully obtain systems' Authorization to Operate (ATO).\nMinimum Qualifications\nBachelor’s degree in a related discipline an additional 4 years of related experience may be accepted in lieu of degree.\n12+ years of total experience, including a minimum of 8 years of experience within an SCI or SAR environment.\n4 years of direct Special Access Program (SAP) relevant experience.\nMust meet DoD Directive 8570.01-M/8140 requirements for Information Assurance Technician (IAT) Level 3 and Information Assurance Manager (IAM) Level 3 within 6 months of hire. CISSP Recommended.\nFull understanding of Risk Management Framework (RMF) and Joint SAP Implementation Guide (JSIG) processes for system accreditation.\nPreferred Qualifications\nFamiliarity with DoD security policies, manuals, and appropriate ICDs, JAFANs, and related guiding policy documents.\nProven ability to work in a dynamic environment and effectively interact with DoD, military, civilian, and industry partners.\nStrong working knowledge of Microsoft Office applications including Word, PowerPoint, and Excel.\nPossess a high degree of originality, creativity, and initiative while requiring minimal supervision.\nClearance Requirements\nCurrent Top-Secret Clearance with SCI Eligibility.\nMust be eligible for access to Special Access Programs (SAP).\nWillingness to submit to a Counterintelligence polygraph.\nPhysical Requirements\nMust be willing to travel within the organizational Area of Responsibility (AOR), including both air and ground transportation.\nPerson in this position may remain in a stationary position 50% of the time in closed-area offices.\nMust be able to occasionally move about inside and outside of the office to access files, cabinets, and safes, or install and remove computer-related equipment.\nThe projected compensation range for this position is $179,300.00-$318,400.00. There are differentiating factors that can impact a final salary/hourly rate, including, but not limited to, Contract Wage Determination, relevant work experience, skills and competencies that align to the specified role, geographic location (For Remote Opportunities), education and certifications as well as Federal Government Contract Labor categories. In addition, MANTECH invests in its employees beyond just compensation. MANTECH’s benefits offerings include, dependent upon position, Health Insurance, Life Insurance, Paid Time Off, Holiday Pay, short-term and long-term Disability, Retirement and Savings, Learning and Development opportunities, wellness programs as well as other optional benefit elections.\nMANTECH considers all qualified applicants for employment without regard to disability or veteran status or any other status protected under any federal, state, or local law or regulation.\nIf you need a reasonable accommodation to apply for a position with MANTECH, please email us at  and provide your name and contact information.","description_format":"text","description_chars":4874,"description_truncated":false,"requirements":{"experience_years_min":12,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"bachelor","optional":false},"security_clearance":true,"languages":[]},"benefits":["Health insurance","Life insurance","Wellness"],"hiring_locations":[{"name":"United States","iso":"US","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["National Security","Information Security","IT Consulting & Digital Transformation"],"lifecycle":[{"event":"open","at":"2026-10-23T22:06:37Z"}],"visa":[],"liveness":{"score":90,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.903,"p_room":1,"age_days":2,"expected_fill_days":12,"reasons":["conf:1","velocity","win:early","comp:brand"],"computed_at":"2026-10-26T05:57:25Z"},"pay":{"stated_usd_annual":318400,"is_top_pay":true},"html_url":"https://alion.io/job/mantech-cyber-system-security-engineer-2","json_url":"https://alion.io/job/mantech-cyber-system-security-engineer-2.json","meta":{"generated_at":"2026-10-27T00:03:35Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":53,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-28T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":179527},"rest":"https://alion.io/mcp/rest/get_company?id=179527"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fmantech-cyber-system-security-engineer-2"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Fmantech-cyber-system-security-engineer-2"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Fmantech-cyber-system-security-engineer-2"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/mantech-cyber-system-security-engineer-2\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fmantech-cyber-system-security-engineer-2"}]}