{"id":3975744,"url":"https://alion.io/job/mantech-information-system-security-engineer-5","title":"Information 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":"services","is_intermediary":false,"listed_via":null,"ats_vendor":"Avature","truth_index":{"grade":"A","score":100,"open_postings":75,"ghost_share":0,"stale_share":0,"repost_share":0.04,"time_to_fill_p50_days":15,"computed_at":"2026-11-09T06:03:00Z"}},"role":"Security","role_family":"Security","seniority":"middle","employment_type":null,"work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Chantilly, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":114600,"max":190200,"currency":"USD","period":"year","gross":null,"usd_annual":190200},"salary_estimate":null,"experience_years_min":4,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"IAM","optional":false},{"name":"Splunk","optional":true}],"status":"live","first_seen_at":"2026-11-09T17:56:49Z","employer_posted_date":"2026-11-09","last_verified_at":"2026-11-09T17:56:49Z","board_verified":true,"closed_at":null,"days_open":0,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":0},"description":"Unlock the secrets of intelligence with MANTECH! Join a dynamic team at the forefront of national security, providing advanced solutions to government intelligence agencies. Since 1968, we’ve been solving the toughest challenges with groundbreaking tech. Explore thrilling projects in Digital Transformation, Cybersecurity, IT, Data Analytics and Software Development. Elevate your career and make a difference. Your adventure begins now-unleash your potential with MANTECH!\nMANTECH seeks a motivated, career and customer-oriented Information System Security Engineer ISSE to join our team in Chantilly, VA.\nAs a Senior Information System Security Engineer ISSE, you will use your technical ISSE and IA experience to provide advice, assistance, and guidance to a government intelligence customer.\nResponsibilities include, but are not limited to:\nPerform, or review, technical security assessments of computing environments to identify points of vulnerability, non-compliance with established Information Assurance (IA) standards and regulations, and recommend mitigation strategies.\nApply knowledge of IA policy, procedures, and workforce structure to design, develop, and implement secure networking, computing, and enclave environments.\nContribute to the security planning, assessment, risk analysis, risk management, certification and awareness activities for system and networking operations.\nReview certification and accreditation (C&A) documentation, providing feedback on completeness and compliance of its content.\nSupport security authorization activities in compliance with Information System Certification and Accreditation Process (ICD 503), the NIST Risk Management Framework (RMF) process, and prescribed ICs business processes for security engineering.\nAssist architects and systems developers in the identification and implementation of appropriate information security functionality to ensure uniform application of government security policy and enterprise solutions.\nOccasional travel, 25% CONUS\nMinimum Qualifications:\nBachelor’s Degree and 4 years of relevant experience, or high school diploma/GED and 9 years of relevant experience\nFamiliarity with information system security principles.\nExperience with interfacing and briefing military, civilian, and contractor personnel at all levels.\nKnowledge of security-related IC and DoD policies, procedures and operating instructions.\nExperience in applying system security engineering expertise in one or more of the following: system security design process; engineering life cycle; information domain; cross domain solutions; commercial off-the-shelf and government off-the-shelf cryptography; identification, authentication, and authorization; system integration; risk management; intrusion detection; contingency planning; incident handling; configuration control; change management; auditing; certification and accreditation process; principles of IA (confidentiality, integrity, non-repudiation, availability, and access control); and security testing.\nOne of the following certifications required Information Assurance Management (IAM) Level I: CAP, GSLC, CISM, CASP, CISSP, CCISCO, Security+.\nPreferred Qualifications:\nExperience in supporting the Government in the enforcement of the design and implementation of trusted relationships among external systems and architectures.\nExperience in supporting the building of security architectures and enforcing the design and implementation of trusted relations among external systems and architectures.\nExperience as a primary security engineering representative on engineering teams for the design, development, implementation, evaluation, and/or integration of secure networking, computing, and enclave environments.\nExperience in assessing and mitigating system security threats/risks throughout the program life cycle.\nExperience with Trellix ePolicy Orchestrator\nExperience Tenable Security Center\nExperience with Splunk \nSecurity Clearance Requirement:\nActive/current TS/SCI with Polygraph is required.\nPhysical Requirements:\nMust be able to be in a stationary position more than 50% of the time\nMust be able to communicate, converse, and exchange information with peers and senior personnel\nConstantly operates a computer and other office equipment\nThe projected compensation range for this position is $114,600.00-$190,200.00. 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":5427,"description_truncated":false,"requirements":{"experience_years_min":4,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"high_school","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":"2026-11-09T17:56:49Z"}],"visa":[],"liveness":{"score":86,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.86,"p_room":1,"age_days":0,"expected_fill_days":15,"reasons":["conf:1","win:early","comp:brand"],"computed_at":"2026-11-09T19:12:53Z"},"pay":{"stated_usd_annual":190200,"is_top_pay":true},"html_url":"https://alion.io/job/mantech-information-system-security-engineer-5","json_url":"https://alion.io/job/mantech-information-system-security-engineer-5.json","meta":{"generated_at":"2026-11-09T19:12:53Z","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":4762,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-10T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.1,"usd":0.01,"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-information-system-security-engineer-5"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":2,"usd":0.2},"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-information-system-security-engineer-5"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.1,"usd":0.01},"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-information-system-security-engineer-5"},{"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-information-system-security-engineer-5\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fmantech-information-system-security-engineer-5"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":3975744}},{"tool":"search_jobs","arguments":{"company":"mantech.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":3975744},"note":"people open to offers who fit this vacancy"}],"note":"The same data through MCP tools: https://alion.io/mcp/open needs no sign-in (compact searches, postings, people); https://alion.io/mcp with an Alion account has everything. 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