Cyber Security Engineer with Security Clearance

R-00191478 Description Leidos is seeking highly qualified professionals to support the TSA TOMCAT Program. We are especially interested in connecting with current incumbent personnel supporting this mission who are interested in continuing their work and bringing their valuable mission knowledge and experience to Leidos.

Position Summary The Cybersecurity Engineer provides engineering and operational cybersecurity support across the TOMCAT environment, integrating security requirements into enterprise IT operations, incident response, vulnerability management, system changes, patching, and service delivery.   ​ The position works closely with TSA SOC personnel, Information Assurance leadership, system owners, infrastructure engineers, ServiceNow teams, and operational service teams to   identify , analyze, remediate, and track cybersecurity risks while   maintaining   mission continuity.   Work Location Remote, with onsite, surge, or shift support as required. ​

Essential Duties  Could Include the following: * ​ Provide cybersecurity engineering and operational support for TOMCAT enterprise services.   * ​ Support vulnerability management, security remediation, POA&&M activities, RMF processes, and cybersecurity compliance reporting.   * ​ Analyze vulnerability findings, security risks, remediation status, exceptions, and trends.   * ​ Coordinate cybersecurity remediation activities with system owners, infrastructure engineers, patch teams, and operations leads.   * ​ Support detection, analysis, and response to cybersecurity incidents.   * ​ Coordinate with TSA SOC, ISSOs, CIC, and technical service towers during cyber-related incidents.   * ​ Analyze security alerts, indicators, affected assets, containment actions, and remediation status.   * ​ Support security configuration, patching, hardening, monitoring, and technical-contr ol activities.   * ​ Maintain audit evidence, cybersecurity reporting artifacts, corrective-action records, and technical documentation.   * ​ Support FISMA, NIST, TSA/DHS security requirements, and operational compliance activities.   * ​ Integrate cybersecurity considerations into incident, change, release, configuration, and operational processes.   * ​ Support security assessments and technical reviews of proposed changes and   new technologies .   * ​ Participate in root-cause analysis and lessons-learned activities following cybersecurity events.   * ​ Maintain cybersecurity SOPs, runbooks, technical procedures, and knowledge articles.   * ​ Provide technical recommendations to improve the security and resilience of enterprise services.

Qualifications Could Include Requirements will vary depending on the specific position and level. Qualifications may include:

• Bachelors degree and 8+ years of prior relevant experience with either cy bersecurity engineering, information security, or information assurance experience in an enterprise or federal environment.  A dditional years of experience may be considered in lieu of degree. * ​ Knowledge of NIST cybersecurity principles and federal cybersecurity requirements.   * ​ Experience with vulnerability management, remediation, POA&&M, RMF, and security reporting.   * ​ Knowledge of cybersecurity incident response processes.   * ​ Experience working with enterprise security, endpoint, network, cloud, or infrastructure technologies.   * ​ Strong analytical, troubleshooting, documentation, and communication skills.   * ​ Ability to coordinate cybersecurity actions with technical operations without disrupting mission systems.
• Ability to obtain and maintain TSA Suitability
• Ability to obtain and maintain Public Trust Security Clearance Required Certifications   ​ One or more of the following, consistent with the source li brary:   * ​ Security+.   * ​ CISSP.   * ​ CySA +.   * ​ GCIH or GCIA.   * ​ CAP/CGRC.   ​

Preferred Qualifications   * ​ TSA, DHS, or federal cybersecurity experience.   * ​ Experience with SIEM, EDR, vulnerability-management, endpoint, network, cloud, or security-monitoring tools.   * ​ Experience with ServiceNow security/incident workflows.   * ​ Experience supporting RMF and FISMA environments.   * ​ Zero Trust, cloud security, or enterprise security engineering experience. Important Compensation Information Please disregard the salary range displayed on this evergreen posting as representative of all TSA TOMCAT opportunities.

This posting is intended to identify candidates across multiple functional areas and experience levels and, therefore, the displayed range may not reflect the compensation associated with an individual position. Compensation for specific opportunities will be determined based on the position for which an individual is considered or hired and may vary based on factors including experience level, skills, certifications, education, security clearance requirements, work location, and other position-specific considerations.

If you are currently supporting this mission and are interested in learning more about opportunities with Leidos, we encourage you to apply even if you do not see your exact position listed above. Join Leidos and help continue delivering the technology, expertise, and mission support that enable TSA TOMCAT operations. If you're looking for comfort, keep scrol ling. 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.

Original Posting: September 4, 2026 For 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.

Pay Range: Pay Range $107,900.00 - $195,050.00 The 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.

About Leidos Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $16.7 billion for the fiscal year ended January 3, 2025. For more information, visit www. Leidos.com . Pay and Benefits Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers.

Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available at www.leidos.com/careers/pay-benefits . Securing Your Data Beware of fake employment opportunities using Leidos’ name. Leidos will never ask you to provide payment-related information during any part of the employment application process (i.e., ask you for money), nor will Leidos ever advance money as part of the hiring process (i.e., send you a check or money order before doing any work).

Further, Leidos will only communicate with you through emails that are generated by the Leidos.com automated system – never from free commercial services (e.g., Gmail, Yahoo, Hotmail) or via WhatsApp, Telegram, etc. If you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at .

If you believe you are the victim of a scam, contact your local law enforcement and report the incident to the U.S. Federal Trade Commission . Commitment to Non-Discrimination All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law.

Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws. #Remote