Security Engineer

Description

LeidosAirports, Borders, and Securityis seeking a highly motivatedCybersecurity Engineer to supportTSA on anationwideprogram.The successful candidate will join an existingteam supportingcloud-based infrastructure and devices deployed throughout the US and US Territories.The team is highly integrated, and the successful candidate will be expected to learn the existing architecture and provide support both during normal hours, after hour patching, and on call as needed.The individual will be expected to be able to work with minimal supervision and be self-directed in the areas of theirresponsibility.

In addition to responsibilities on program thiscandidate will providetheirspecialized knowledge to help push forward Transportation Security Administration (TSA) Modernization efforts. This role serves as a bridge between Leidos' innovative solutions and TSA's specific mission to protect the nation's transportation systems and ensure freedom of movement for people and commerce. As part of the team, the Security Engineer will design and implement network monitoring and identity management solutions, conduct threat modeling, and ensure compliance with security standards. The ideal candidate brings experience with security accreditation, vulnerability assessment, and hands-on technical implementation.

Primary Responsibilities:

• Administer and harden Cloud based environment.

• Administer and harden servers and workstations (e.g., RHEL, Windows) including OS configuration, patching, and security baseline enforcement.

• Administer and harden network appliances (e.g.VPN, SWG, NGFW) including configuration, patching, and security baseline enforcement.

• Generate compliance and vulnerability reports for leadership, auditors, and governanceteams;track remediation progress and aging.

• Interpret technical vulnerabilities (CVEs, CVSS) and clearly communicate risk and remediation options to technical and non-technical stakeholders.

• Design, implement andmaintainsecure system architecturesin accordance withorganizational policies and industry best practices.

• Provide support for Active Directory and networking issues.

• Provide user support and training, managing system access, permissions, and issue resolution.

• Manage account creation, modification, and termination in compliance with security protocols.

• Implement/configure IT equipment per DISA STIGs and resolve compliance issues

• Run vulnerabilityand compliancescans and remediate findings

• Design and implement network monitoring and maintenance solutions

• Implementcentralized account management forTSS Common Workstation (CW) users

• Create threat models forLeidos airportofferings andsolutions

• Document and deliveranydocumentation that may berequiredto obtain Authorization to Operate (ATO)e.g., System Security Plan (SSP),Security Assessment Report (SAR),Contingency Plan,NetworkPorts, Protocols, and Services Management (PPSM)

• Resolve, track, andbring to closurePlan of Actions & Milestones(POA&M)

Basic Qualifications:

• Must be a US Citizen

• Must be able toattaina suitability determination from TSA

• Demonstrated ability to work independently with minimalsupervision

• Excellent problem-solving skills.

• Proficiencywith common Agile practices, service-oriented environments, and better developmentpractices

• Experience with networking ports and protocols, architecture of networked systems, functionality of various operating systems, cloud computingenvironmentsand common security tools.

• Experience in working collaboratively within a remote environment.

• Strong consulting, leading, and mentoring skills along with the ability to effectively communicate and collaborate with stakeholders at all levels.

• Broad knowledge of and experience with a wide variety of application technologies, platforms, and tools including security and infrastructure configuration and monitoring.

• Excellent written, verbal, and presentation communication skills.

• Demonstrated experience applying efficient task management and ability to adjust to changing requirements

• Excellent analytical and technical skills.

• Bachelor's Degree inComputer Science, Engineering, or a similarfieldor 10+ years relevant experience and associated certifications

• CISSP or Security + certification

• Experience working with government agency to obtain ATOfornew IT services

• Experienceenforcing DISA STIGsecurity policies in Windows and Linux environments

• Familiarity with NIST Risk Management Framework (RMF)

• Familiarity with DISA STIGs and vulnerability scanning tools (e.g., Nessus, Nipper)

Preferred Qualifications:

• Experienceimplementing Endpoint Management Solutions(e.g.,TrellixEndpointSecurity,ePolicyOrchestrator)

• Experience with network monitoring solutions(e.g., PRTG)

• Experience with centralized Security Information and Event Management (SIEM) solutions(e.g., Splunk)

• Experience accrediting systems and obtaining ATO from TSA

• Familiarity with threat modeling tools (e.g., OWASP Threat Dragon,Microsoft Threat Modeling Tool)

• AWS Certification

• Familiarity with Red Hat Open Shift

If 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.

Original Posting: February 26, 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 $131,300.00 - $237,350.00

The Leidos pay range for this job level is a general guideline onlyand 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

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

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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.

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