{"id":3686853,"url":"https://alion.io/job/mantech-senior-cyber-security-engineer-5","title":"Senior Cyber 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":79,"ghost_share":0,"stale_share":0,"repost_share":0.038,"time_to_fill_p50_days":13,"computed_at":"2026-11-05T05:54:30Z"}},"role":"Security","role_family":"Security","seniority":"senior","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":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Active Directory","optional":false},{"name":"Agile","optional":false},{"name":"LDAP","optional":false},{"name":"PKI","optional":false},{"name":"Windows","optional":false},{"name":"Windows Server","optional":false},{"name":"Ansible","optional":true},{"name":"Configuration Management","optional":true},{"name":"PowerShell","optional":true}],"status":"live","first_seen_at":"2026-11-03T15:09:51Z","employer_posted_date":"2026-11-03","last_verified_at":"2026-11-05T12:11:18Z","board_verified":true,"closed_at":null,"days_open":1,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":1},"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 Senior Cyber Security Engineer to join our team in Chantilly, VA.\nThe Senior Cyber Security Engineer will leverage their strong technical background, PKI expertise, and identity management knowledge to support mission-critical cyber security solution delivery, testing, and system deployment across secure classified enterprise networks.\nResponsibilities include but are not limited to:\nMaintaining operations of identity and access management services including directory services, user access controls, identity lifecycle workflows, Public Key Infrastructure (PKI), and privileged access management.\nEngineering, deploying, and maintaining Public Key Infrastructure (PKI) systems, digital certificates, cryptographic protocols, and multi-factor authentication (MFA) solutions.\nMaintaining critical infrastructure across Linux and Windows server environments in virtualized, on-premises, and cloud architectures.\nPerforming routine and scheduled Linux and Windows operating system upgrades, security patches, baseline configurations, and system hardening.\nManaging Continuous Monitoring (CONMON) activities, vulnerability mitigations, and compliance reporting to maintain enterprise Authority to Operate (ATO).\nProviding structured status updates, technical documentation, and cross-functional coordination within an Agile and collaborative operational framework.\nMinimum Qualifications:\nBachelor's degree or 4+ years of additional experience in lieu of a degree\n5+ years of professional experience\nDemonstrated hands-on experience supporting and maintaining Public Key Infrastructure (PKI), digital certificate lifecycle management, and authentication/authorization protocols.\nHands-on system administration experience working across enterprise Linux and Windows operating systems in classified or unclassified environments.\nWorking knowledge of directory services, LDAP/Active Directory administration, user account management, and database structures.\nDemonstrated ability to develop and implement automation scripts or workflow tracking solutions to optimize operational processes and system maintenance.\nMust have or be willing to obtain an IAT Level II certification within 3 months of hire.\nPreferred Qualifications:\nFamiliarity with configuration of Information Security Corp. (ISC) PKI products (CertAgent and CCMS)\nDirect experience implementing, maintaining, and troubleshooting enterprise PKI management tools and digital certificate services.\nFamiliarity with configuration management, automation playbooks, or scripting platforms such as Ansible or PowerShell.\nDemonstrated experience collaborating within Agile, DevOps, or cross-functional technical teams.\nPrior military or Department of Defense operational background supporting mission-critical IT infrastructure, network security, and compliance workflows.\nClearance Requirements:\nAn active TS/SCI with Polygraph is required.\nPhysical Requirements:\nMust be able to remain in a stationary position 50% of the time.\nNeeds to occasionally move about inside the office to access file cabinets, office machinery, and technical equipment.\nFrequently communicates with co-workers, management, and customers, which may involve delivering technical briefings and operational updates. Must be able to exchange accurate information in these situations.\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":4990,"description_truncated":false,"requirements":{"experience_years_min":5,"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":["Cybersecurity","Digital Signature","Information Security","IT Consulting & Digital Transformation"],"lifecycle":[{"event":"open","at":"2026-11-03T15:09:51Z"}],"visa":[],"liveness":{"score":99,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.993,"p_room":1,"age_days":1,"expected_fill_days":13,"reasons":["conf:4","wave","velocity","win:early","comp:brand"],"computed_at":"2026-11-05T05:54:30Z"},"pay":{"stated_usd_annual":190200,"is_top_pay":true},"html_url":"https://alion.io/job/mantech-senior-cyber-security-engineer-5","json_url":"https://alion.io/job/mantech-senior-cyber-security-engineer-5.json","meta":{"generated_at":"2026-11-05T14:03:40Z","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":18078,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-06T00:00:00Z"}},"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-senior-cyber-security-engineer-5"},{"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-senior-cyber-security-engineer-5"},{"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-senior-cyber-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-senior-cyber-security-engineer-5\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fmantech-senior-cyber-security-engineer-5"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":3686853}},{"tool":"search_jobs","arguments":{"company":"mantech.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":3686853},"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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