{"id":167679,"url":"https://alion.io/job/general-dynamics-information-technology-cybersecurity-engineer-sr-principal","title":"Cybersecurity Engineer Sr Principal","company":{"id":4418,"name":"General Dynamics Information Technology","domain":"gdit.com","url":"https://alion.io/company/gdit","size_band":"5000+","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Workday","truth_index":{"grade":"A","score":100,"open_postings":29,"ghost_share":0,"stale_share":0,"repost_share":0,"time_to_fill_p50_days":39,"computed_at":"2026-11-01T06:10:25Z"}},"role":"Security","role_family":"Security","seniority":"lead","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["McLean, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":170000,"max":230000,"currency":"USD","period":"year","gross":null,"usd_annual":230000},"salary_estimate":null,"experience_years_min":10,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Red Hat","optional":false},{"name":"Splunk","optional":false}],"status":"live","first_seen_at":"2026-08-28T00:00:00Z","employer_posted_date":"2026-08-28","last_verified_at":"2026-11-01T19:29:18Z","board_verified":true,"closed_at":null,"days_open":65,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":65},"description":"Type of Requisition:\nRegularClearance Level Must Currently Possess:\nTop Secret/SCIClearance Level Must Be Able to Obtain:\nTop Secret/SCIPublic Trust/Other Required:\nNoneJob Family:\nCyber and IT Risk ManagementJob Qualifications:\nSkills:\nActive Directory (AD), Redhat Linux Server, Splunk Administration, Tenable Security CenterCertifications:\nNoneExperience:\n10 + years of related experienceUS Citizenship Required:\nYes Job Description:\nCYBERSECURITY ENGINEER SR PRINCIPAL\nAdvance your career while impacting our national security in cyber as a Cybersecurity Engineer Sr Principal at GDIT. Here, technologists have many paths to grow a meaningful career supporting cyber missions and operations across the federal government.\nMEANINGFUL WORK AND PERSONAL IMPACT\nAs a Cybersecurity Engineer Sr Principal, the work you’ll do at GDIT will be impactful to the mission of our customer’s classified commercial cloud environment. You will play a crucial role in engineering and operating security controls for a classified secure workstation enclave, ensuring continuous monitoring, and compliance for mission-critical systems.\nSupport and lead configuration, hardening, and updates of Linux operating systems, directly contributing to the secure operation of the enclave.\nCollaborate with enclave engineers, system administrators, and vendors to administer and maintain core security applications (SIEM, vulnerability scanning, endpoint protection, insider threat tooling) that safeguard the environment.\nDrive continuous monitoring and incident response activities by validating telemetry, triaging alerts, investigating incidents, and supporting RMF-aligned vulnerability management, endpoint security, and auditing.\nUtilize Red Hat/Linux, Splunk, Tenable, Trellix, Teramind, and Microsoft Active Directory/Group Policy to implement and validate security controls, maintain visibility, and provide actionable insights into the enclave’s security posture.\nConfigure, harden, and update Linux operating systems within the secure enclave.\nAdminister and monitor core security tools (Splunk SIEM, Tenable, Trellix, Teramind), ensuring telemetry, policies, and integrations function as intended.\nTriage and investigate security alerts and incidents in alignment with the Incident Response Plan.\nOversee vulnerability and STIG scanning (host inventory, scan policies, and results) and coordinate remediation with the engineering team.\nEnsure complete endpoint visibility and policy enforcement across hosts and insider threat tooling.\nSupport RMF Continuous Monitoring activities, including vulnerability management, endpoint security, auditing, and security alert monitoring.\nContribute to security documentation, control implementation statements, assessment artifacts, and POA&M mitigation activities.\nWHAT YOU’LL NEED TO SUCCEED\nBring your cyber expertise and drive for innovation to GDIT. The Cybersecurity Engineer Sr Principal must have:\nEducation: Bachelor of Arts/Bachelor of Science\nExperience: 10+ years of related experience\nTechnical skills:\nHands-on experience with Red Hat operating system and other Linux distributions\nHands-on engineering experience administering and maintaining security operations using Splunk (SIEM), Tenable (vulnerability management), and Trellix (endpoint security)\nHands-on experience with Teramind for insider threat monitoring\nUnderstanding of Microsoft Active Directory and implementing controls via Group Policy\nKnowledge of the complete NIST SP 800 series (especially 800-37, 800-53, 800-30) and risk management principles\nSecurity clearance level: Active Top Secret\nRole requirements:\nOnsite -McLean, VA\nMust be DoD 8140 / 8570.01-M compliant\nGDIT IS YOUR PLACE\nAt GDIT, the mission is our purpose, and our people are at the center of everything we do.\nGrowth: AI-powered career tool that identifies career steps and learning opportunities\nSupport: An internal mobility team focused on helping you achieve your career goals\nRewards: Comprehensive benefits and wellness packages, 401K with company match, and competitive pay and paid time off\nFlexibility: Full-flex work week to own your priorities at work and at home\nCommunity: Award-winning culture of innovation and a military-friendly workplace\nOWN YOUR OPPORTUNITY\nExplore a career in cyber at GDIT and you’ll find endless opportunities to grow alongside colleagues who share your focus on defending and protecting what matters.\nThe likely salary range for this position is $170,000 - $230,000. This is not, however, a guarantee of compensation or salary. Rather, salary will be set based on experience, geographic location and possibly contractual requirements and could fall outside of this range.Scheduled Weekly Hours:\n40Travel Required:\n10-25%Telecommuting Options:\nOnsiteWork Location:\nUSA VA McLeanAdditional Work Locations:\nTotal Rewards at GDIT:\nOur benefits package for all US-based employees includes a variety of medical plan options, some with Health Savings Accounts, dental plan options, a vision plan, and a 401(k) plan offering the ability to contribute both pre and post-tax dollars up to the IRS annual limits and receive a company match. To encourage work/life balance, GDIT offers employees full flex work weeks where possible and a variety of paid time off plans, including vacation, sick and personal time, holidays, paid parental, military, bereavement and jury duty leave. To ensure our employees are able to protect their income, other offerings such as short and long-term disability benefits, life, accidental death and dismemberment, personal accident, critical illness and business travel and accident insurance are provided or available. We regularly review our Total Rewards package to ensure our offerings are competitive and reflect what our employees have told us they value most.Our Identity Verification Process:\nAs part of the hiring process, we will ask you to complete an identity verification process that leverages advanced biometrics and artificial intelligence to ensure authenticity and protect against identity fraud. You are expected to be on camera during virtual interviews. We reserve the right to take your picture to verify your identity and prevent fraud. By proceeding, you authorize the collection, processing, and use of your biometric data for identity verification and security purposes.About Our Work:\nWe are GDIT. A global technology and professional services company that delivers technology solutions and mission services to every major agency across the U.S. government, defense and intelligence community. Our 26,000 experts extract the power of technology to create immediate value and deliver solutions at the edge of innovation. We operate across 50+ countries worldwide, offering leading mission-ready capabilities in AI, cloud, cyber and software development.Join our Talent Community to stay up to date on our career opportunities and events atgdit.com/tc.\nEqual Opportunity Employer / Individuals with Disabilities / Protected Veterans","description_format":"text","description_chars":6998,"description_truncated":false,"requirements":{"experience_years_min":10,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"bachelor","optional":false},"security_clearance":true,"languages":[]},"benefits":["401k plan"],"hiring_locations":[{"name":"United States","iso":"US","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Cybersecurity","Information Security","National Security","Security Operations"],"lifecycle":[{"event":"open","at":"2026-08-28T00:00:00Z"},{"event":"open","at":"2026-10-14T02:00:51Z"}],"visa":[{"country":"US","licensed_sponsor":true,"evidence":"H-1B filings in 12 months: 21 · green card filings: 4","filings_12m":21,"filings_prev_12m":30,"green_card_filings_12m":4,"median_offered_wage_usd":154900,"route":null,"cap_exempt":false,"checked_at":"2026-10-29T16:27:21+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":0}],"liveness":{"score":28,"band":"fade","label":"Fading","p_open":1,"p_active":0.768,"p_room":0.36,"age_days":65,"expected_fill_days":39,"reasons":["conf:5","velocity","win:tail","crowd:brand"],"computed_at":"2026-11-01T06:10:25Z"},"pay":{"stated_usd_annual":230000,"is_top_pay":true},"html_url":"https://alion.io/job/general-dynamics-information-technology-cybersecurity-engineer-sr-principal","json_url":"https://alion.io/job/general-dynamics-information-technology-cybersecurity-engineer-sr-principal.json","meta":{"generated_at":"2026-11-01T20:10:35Z","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":31016,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-02T00:00:00Z"}},"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":4418},"rest":"https://alion.io/mcp/rest/get_company?id=4418"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fgeneral-dynamics-information-technology-cybersecurity-engineer-sr-principal"},{"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%2Fgeneral-dynamics-information-technology-cybersecurity-engineer-sr-principal"},{"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%2Fgeneral-dynamics-information-technology-cybersecurity-engineer-sr-principal"},{"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/general-dynamics-information-technology-cybersecurity-engineer-sr-principal\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fgeneral-dynamics-information-technology-cybersecurity-engineer-sr-principal"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":167679}},{"tool":"search_jobs","arguments":{"company":"gdit.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":167679},"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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