Principal Cyber Security Architect

This role is part of a growing program, and hiring will depend on available funding. We review applications on a rolling basis, but the timeline for interviews and offers may vary. In some cases, we may extend contingent offers that become active once funding is confirmed.This position is located in Gaithersburg, MD; Egg Harbor Township, NJ; or Eagan, MN. This is an opportunity to contribute to projects that impact millions of air travelers. This is a hybrid position requiring 3 days onsite and 2 days remote work. Candidates should reside a commutable distance to one of the above locations. Leidos is seeking a Cyber Security Architect to join the Air Traffic Business Area within the Homeland Sector, supporting the development of the Leidos Common Automation Platform (L-CAP). L-CAP is a mission-critical, future-ready automation platform built on a hybrid cloud data mesh architecture, enabling next-generation air traffic management capabilities. You will serve as a senior cybersecurity architect responsible for defining the security architecture across a large-scale hybrid cloud platform supporting national air traffic operations. We are building with an AI-first engineering mindset, embracing emerging AI capabilities and modern development practices to accelerate delivery, improve software quality, and continuously evolve how we design and build mission-critical systems. This position supports government programs and requires the ability to obtain and maintain a favorable Public Trust investigation.What You'll DoDefine and maintain the cybersecurity architecture for the L-CAP platformDevelop and execute the FedRAMP compliance strategy across cloud environmentsLead Authority to Operate (ATO) planning and execution activitiesConduct threat modeling and vulnerability assessments across platform componentsDesign and implement zero trust architecture principles across the enterpriseEstablish and govern the security controls framework aligned to NIST 800-53Integrate security practices into DevSecOps pipelines and CI/CD workflowsProvide cybersecurity governance across four Agile Release Trains (ARTs)Define security requirements for platform services and application teamsPerform risk assessments and recommend mitigations for emerging threatsDefine security architecture for distributed real-time ATC services including inter-service communication protection and API gateway securityEstablish software supply chain integrity controls including SBOM generation, artifact signing, and dependency vulnerability managementDesign security patterns for cloud-native service communications protecting mission-critical ATC data flowsChampion an AI-first engineering culture by identifying and applying AI-assisted development capabilities, automation, and emerging software engineering practices that improve developer productivity, code quality, testing, and delivery.Core Technical Qualifications:Bachelor's degree with 12+ years of cybersecurity experienceDemonstrated cybersecurity architecture experience for enterprise platformsDeep knowledge of FedRAMP authorization processes and requirementsExpertise in NIST 800-53 security controls and Risk Management Framework (RMF)Experience leading ATO efforts for federal information systemsKnowledge of zero trust architecture principles and implementation patternsExperience with safety-critical systems security requirementsCloud security expertise across AWS and/or Azure environmentsUnderstanding of distributed systems security challenges and solutionsAbility to obtain and maintain a Public Trust clearance; US citizenship required; subject to government background investigationExperience securing distributed real-time services and microservice communication patternsKnowledge of software supply chain security practices (SLSA, SBOM, artifact signing, dependency scanning) Ability to obtain and maintain a Public TrustU.S. citizenship requiredSuccessful completion of background investigations as required by the government customer Preferred / Desired Qualifications CISSP, CISM, or equivalent cybersecurity certificationsFAA or aviation-sector cybersecurity experiencePenetration testing and red team experienceSIEM architecture and security operations designMission assurance and continuity of operations experienceDoD or federal civilian agency cybersecurity programsExperience securing real-time operational systems in aviation or air traffic control environmentsWhy Leidos? You’ll work on systems where performance, precision, and reliability matter — every second. This is not experimental AI for prototypes. This is disciplined, responsible AI applied to mission-critical software that supports national infrastructure. If you’re excited by solving complex problems in regulated, real-world environments — and using AI as a force multiplier rather than a shortcut — we’d like to talk. ATMCIf 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:August 18, 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.Pay Range:Pay 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.SummaryLocation: Gaithersburg, MD; Eagan, MN; Egg Harbor Township, NJType: Full time