{"id":4297326,"url":"https://alion.io/job/fantom-corporation-security-engineer-cross-functional-sme","title":"Security Engineer (Cross-Functional) - SME","company":{"id":673180,"name":"Fantom Corporation","domain":"fantomcorp.com","url":"https://alion.io/company/fantomcorp","size_band":"51-200","is_staffing_agency":false,"employer_type":"services","is_intermediary":false,"listed_via":null,"ats_vendor":"Lever","truth_index":{"grade":"B","score":75,"open_postings":21,"ghost_share":0,"stale_share":1,"repost_share":0,"time_to_fill_p50_days":null,"computed_at":"2026-11-12T10:38:37Z"}},"role":"Security","role_family":"Security","seniority":"staff","employment_type":"full_time","work_mode":"hybrid","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":null,"salary_estimate":null,"experience_years_min":10,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Defense in Depth","optional":false}],"status":"live","first_seen_at":"2026-11-13T21:24:28Z","employer_posted_date":"2026-11-13","last_verified_at":"2026-11-14T01:52:14Z","board_verified":true,"closed_at":null,"days_open":0,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":0},"description":"Fantom Corporation is a mission-focused organization supporting critical programs across the defense and intelligence community. We partner with our customers to deliver high-impact technical solutions while fostering a culture built on trust, expertise, and long-term career growth.\nMust possess an active Top Secret Clearance\nMust be willing and able to obtain a polygraph\nEducation: Bachelor’s degree required\nExperience: Minimum of 10 years of relevant experience\nPosition Summary\nWe are seeking a Security Engineer to protect enterprise applications, cloud platforms, networks, and supporting infrastructure. This role combines application security testing, threat monitoring, incident response planning, cyber resiliency, and secure cloud operations.\nThe engineer identifies vulnerabilities, implements monitoring and alerting capabilities, and safeguards critical data and Internet communications. The position also manages communications security resources, supports compliance activities, and collaborates with industry partners to advise government stakeholders on security risks and recommended improvements.\nResponsibilities\nSecure multiple applications and platforms, identifying critical data, vulnerabilities, and potential exposure points.\n\nDevelop and maintain incident response and recovery plans to support cyber resiliency and operational continuity.\n\nPerform web application and platform security testing, document findings, and recommend corrective actions.\n\nDesign and implement monitoring and alerting capabilities to detect anomalous activity across applications and infrastructure.\n\nMonitor and correlate security data from multiple systems to support threat detection, investigation, remediation, and continuous improvement.\n\nCoordinate with industry partners to advise government stakeholders on vulnerabilities and security recommendations.\n\nInstall, operate, maintain, and upgrade secure cloud computing environments, platforms, software, and core infrastructure.\n\nBuild and improve cloud networks and cloud-based systems in accordance with defense-in-depth security policies and governance guidelines.\n\nManage communications security (COMSEC) resources consistent with CNSSI 4009 terminology, or serve as a key custodian for a cryptographic key management system (CKMS).\n\nProtect organizational websites, Internet transactions, confidential order information, and external business-to-business connections.\n\nImplement and maintain firewall and encryption technologies to protect organizational and customer information.\n\nAdminister user accounts and access permissions, including account updates and deletions.\n\nMonitor compliance violations, investigate findings, and follow up on corrective actions.\n\nDevelop and maintain security policies, practices, procedures, and guidelines.\n\nRequired Qualifications\nMust possess an active Top Secret Clearance\n\n Must be willing and able to obtain a polygraph\nMinimum of 10 years of relevant experience in security engineering, cybersecurity, application security, cloud security, or related technical disciplines.\n\nExperience securing multiple applications and identifying critical data and vulnerability points.\n\nAbility to develop incident response and recovery plans.\n\nKnowledge of cyber resiliency, security planning, and web application and platform security testing.\n\nExperience designing security monitoring and alerting capabilities and investigating anomalous activity.\n\nAbility to correlate security data to detect threats, guide remediation, and recommend system improvements.\n\nExperience operating, maintaining, upgrading, and securing cloud infrastructure, platforms, networks, and software.\n\nUnderstanding of defense-in-depth principles and security governance requirements.\n\nExperience managing COMSEC resources or performing cryptographic key custodial duties.\n\nKnowledge of firewall technologies, encryption, website security, and secure Internet communications.\n\nExperience administering user access, addressing compliance violations, and developing security policies and procedures.\n\nStrong analytical, troubleshooting, and communication skills.\n\nAbility to explain security findings and recommendations to government stakeholders and industry partners.","description_format":"text","description_chars":4244,"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":[],"hiring_locations":[{"name":"United States","iso":"US","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["IT Infrastructure & Networking Services","IT Consulting & Digital 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