{"id":3224183,"url":"https://alion.io/job/leidos-sr-isse-tssci-polygraph-2","title":"Sr. ISSE TS/SCI Polygraph","company":{"id":7791,"name":"Leidos","domain":"leidos.com","url":"https://alion.io/company/leidos","size_band":"5000+","is_staffing_agency":false,"employer_type":"services","is_intermediary":false,"listed_via":null,"ats_vendor":"Workday","truth_index":{"grade":"B","score":78,"open_postings":260,"ghost_share":0.004,"stale_share":0.881,"repost_share":0.004,"time_to_fill_p50_days":28,"computed_at":"2026-10-27T05:46:45Z"}},"role":"DevOps","role_family":"DevOps","seniority":"senior","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Annapolis Junction, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":131300,"max":237350,"currency":"USD","period":"year","gross":null,"usd_annual":237350},"salary_estimate":null,"experience_years_min":12,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Agile","optional":false},{"name":"Configuration Management","optional":false},{"name":"Nessus","optional":false},{"name":"Nmap","optional":false},{"name":"Wireshark","optional":false},{"name":"Defense in Depth","optional":true}],"status":"live","first_seen_at":"2026-10-21T00:00:00Z","employer_posted_date":"2026-10-21","last_verified_at":"2026-10-27T05:37:13Z","board_verified":true,"closed_at":null,"days_open":6,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":6},"description":"Leidos has a new and exciting opportunity for a Sr. Information System Security Engineer in our Intel Sector's Cyber & Analytics Business Area (CABA). Our talented team is at the forefront in Security Engineering, Computer Network Operations (CNO), Mission Software, Analytical Methods and Modeling, Signals Intelligence (SIGINT), and Cryptographic Key Management. At Leidos, we offer competitive benefits, including Paid Time Off, 11 paid Holidays, 401K with a 6% company match and immediate vesting, Flexible Schedules, Discounted Stock Purchase Plans, Technical Upskilling, Education and Training Support, Parental Paid Leave, and much more. Join us and make a difference in National Security!\n*You must have an active TS/SCI Polygraph up front. Unfortunately, no exceptions.*\nLeidos has an exciting opportunity for a Sr. Information System Security Engineer to join a high performing agile team using the Scaled Agile Framework (SAFe) methodology to support a fast-paced, complex program! Program execution follows DEVOPS best practices and employs robust development, test and production environments. Our team of security engineers support enhancements to system security architecture and cyber security capabilities; manage multiple system security plans for development, test and production systems following the Risk Management Framework (RMF); manage cross domain capabilities; and support Security Verification Testing (SVT) of relevant Type 1 devices. The contract provides system engineering, development, test, integration and operational support, and is focused on injecting new technology and adding advanced capabilities while continuing to support an on-going operational system.\nYou will provide support for adding new capabilities to a complex system with exacting interface, performance and security requirements. You will become part of a team of Security Engineers working on providing improvements to our operational, test, integration, and development systems and solving challenging issues on a large, significant program. The position requires a solid understanding of security practices and policies as well as hands-on vulnerability testing experience.\nYou will have numerous responsibilities from day to day drawn from a wide array of activities. The strongest candidates will have experience working in these areas:\nValidating and verifying system security requirements and establishing system security designs for large-scale systems, major system elements, and interfacing systems that are part of a large complex network environment with geographically distributed components.\nIdentifying and implementing appropriate information security architectures and functionality to ensure uniform application of security policy and enterprise solutions.\nRecommending and developing technical solutions, products, and standards based on current and desired system security architecture.\nAssessing and mitigating system security threats and risks throughout the program life cycle.\nLeading and/or contributing to the security planning, assessment, risk analysis, risk management, certification and awareness activities for various system and networking operations.\nEffectively collaborating with other internal technical experts on a day-to-day basis.\nCommunicating with Program Managers and POCs from customer organizations when necessary, regarding Security issues of significant importance.\nParticipating in Program Increment Planning and related agile team activities. \nWorking closely with System Engineering, Test Engineering, and Integration teams to ensure that the hardware and software architecture and implementation meets security requirements.\nAnalyzing and assessing system implementation against multiple security compliance policies and recommending and implementing enhancements.\nEvaluating security solutions to ensure they meet customer specified requirements for processing information.\nEvaluating the impact of new development on the operational security posture of the system.\nEvaluating, reviewing, and testing critical software.\nProposing, assessing, coordinating, implementing, and enforcing information systems security policies, standards, and methodologies.\nAuditing and assessing system security configuration settings using common methodologies and tools.\nManaging and enforcing security strategies and policies that effect various components of geographically distributed systems.\nProviding configuration management for security-relevant information system software.\nServing as a subject matter expert in security architecture to include providing advice to Program Managers, Customer technical experts, and internal program teams.\nFormulating security compliance requirements for new system features.\nIdentifying and remediating security issues throughout the system.\nSupporting risk assessment, risk management, security control assessment, continuous monitoring, service design, and other IA program support functions.\nWorking with development teams to enrich team-wide understanding of different types of vulnerabilities, attack vectors and remediation approaches.\nPlanning and conducting security verification testing of relevant type 1 devices.\nBasic Qualifications\nBS degree and 12 - 15 years of prior relevant experience.\nMust have a solid understanding of security practices and policies and hands-on vulnerability testing experience using Customer tools.\nMust have experience applying Risk Management Framework.\nMust have experience formulating and assessing IT security policy.\nMust have demonstrated knowledge of and experience with common security tools, such as Nessus, NMAP and Wireshark hardware/software security implementation, communication protocol, encryption techniques/tools, and web services.\nMust have experience with secure configurations of commonly used desktop and server operating systems.\nPreferred Qualifications\nMust have experience with Defense in Depth Principals/technology (including access control, authorization, identification and authentication, public key infrastructure, network and enterprise security architecture) and applying risk assessment methodology to system development.\nDoD 8570 compliance with IASAE Level 2 or 3.\nInformation Systems Security Engineering Professional (ISSEP) Certification.\nComputer Information Systems Security Professional (CISSP) Certification.\nExperience developing/implementing integrated security services management processes, such as assessing and auditing network penetration testing, anti-virus planning assistance, risk analysis, and incident response.\nExperience providing information assurance support for application development that includes system security certifications and project evaluations for firewalls that encompass the development, design, and implementation.\nExperience with penetration testing tools.\nExperience with scripting languages.\ncareers.leidos.com/CONMD\nCSSKEY\nCONMD\nIf you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo - because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 - and moving faster than anyone else dares.\nOriginal Posting:\nOctober 21, 2026For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.\nPay Range:\nPay Range $131,300.00 - $237,350.00The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.","description_format":"text","description_chars":8011,"description_truncated":false,"requirements":{"experience_years_min":12,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":true,"languages":[]},"benefits":["401k plan","Equity","Flexible schedule"],"hiring_locations":[{"name":"United States","iso":"US","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["National Security","C4ISR","Defense Manufacturing","Engineering Services"],"lifecycle":[{"event":"open","at":"2026-10-25T04:42:46Z"}],"visa":[{"country":"US","licensed_sponsor":true,"evidence":"H-1B filings in 12 months: 50 · green card filings: 24","filings_12m":50,"filings_prev_12m":58,"green_card_filings_12m":24,"median_offered_wage_usd":124257,"route":null,"cap_exempt":false,"checked_at":"2026-10-15T11:24:14+00:00","sources":["US Department of Labor: LCA disclosure data (H-1B, H-1B1, E-3)","US Department of Labor: PERM disclosure data (green cards)"],"filings_for_role_12m":24}],"liveness":{"score":63,"band":"ok","label":"Likely open","p_open":1,"p_active":0.632,"p_room":1,"age_days":6,"expected_fill_days":28,"reasons":["conf:0","stale_co","velocity","win:early","comp:brand"],"computed_at":"2026-10-27T05:46:45Z"},"pay":{"stated_usd_annual":237350,"is_top_pay":true},"html_url":"https://alion.io/job/leidos-sr-isse-tssci-polygraph-2","json_url":"https://alion.io/job/leidos-sr-isse-tssci-polygraph-2.json","meta":{"generated_at":"2026-10-27T06:48:51Z","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":7126,"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":7791},"rest":"https://alion.io/mcp/rest/get_company?id=7791"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fleidos-sr-isse-tssci-polygraph-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%2Fleidos-sr-isse-tssci-polygraph-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%2Fleidos-sr-isse-tssci-polygraph-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/leidos-sr-isse-tssci-polygraph-2\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fleidos-sr-isse-tssci-polygraph-2"}]}