Leidos Security Enterprise Solutions (SES) is seeking a Senior Product Security Engineer to support a portfolio of shared software platforms and product capabilities used across Ports & Borders and Aviation missions. This senior, hands-on individual contributor will be embedded with the Enterprise Products engineering organization and will partner with cybersecurity leadership, software, DevOps, infrastructure, systems, and product teams. The role translates cybersecurity standards, customer requirements, and product risk into practical controls across architecture, software development, CI/CD pipelines, and the shared deployment platform. The engineer will develop reusable security tooling, automation, hardened configurations, and technical documentation; assess and communicate risk; and help engineering teams implement secure-by-default solutions. Technical findings and recommendations from this role will support formal risk and release decisions made by designated authorities. Primary Responsibilities: Serve as a hands-on product security engineer for Enterprise products and collaborate with cybersecurity leadership, product owners, software engineers, DevOps engineers, infrastructure engineers, systems engineers, and program stakeholders. Translate organizational policies, customer requirements, threat information, and compliance obligations into actionable product security requirements, implementation guidance, and engineering backlog items. Perform threat modeling, attack-surface analysis, security architecture and design reviews, and targeted code or configuration reviews for applications, APIs, data flows, identity services, and distributed system components. Design, integrate, and improve automated security controls within CI/CD pipelines, including static application security testing, software composition analysis, secret detection, container scanning, infrastructure-as-code scanning, software bill of materials generation, and security reporting. Partner with platform and infrastructure teams to define, automate, and validate secure configurations for Linux operating systems, Kubernetes, containers, databases, identity services, networking components, and other common platform services. Develop and validate hardened baselines using DISA STIGs and SRGs, CIS Benchmarks, customer requirements, and industry best practices; automate implementation and verification where practical. Assess product and platform vulnerabilities, analyze technical risk, prioritize findings, provide actionable remediation guidance, coordinate with owning teams, and verify corrective actions. Support secure implementation of authentication, authorization, role-based access control, encryption, secrets management, certificate management, audit logging, service-to-service communication, and data protection controls. Develop reusable security tools, scripts, pipeline templates, configuration baselines, reporting capabilities, and secure implementation patterns that can be adopted across Enterprise products and other engineering teams. Create and maintain security engineering documentation and technical evidence supporting applicable NIST, CMMC, RMF, DHS, TSA, DISA, customer-specific, and international requirements. Perform security testing and technical validation of significant releases, architectural changes, and platform changes, including targeted penetration testing when appropriate. Communicate findings, remediation options, residual risks, and technical tradeoffs to technical and nontechnical stakeholders, and promote secure development practices through guidance and reusable self-service capabilities. Required Qualifications: Bachelor's degree in Cybersecurity, Computer Science, Computer Engineering, Software Engineering, Information Systems, or a related technical discipline with 8+ years of relevant experience; or a master's degree with 6+ years of relevant experience. Additional relevant experience may be considered in lieu of a degree where permitted by the selected job profile. Hands-on experience in product security, application security, software security, DevSecOps security, platform security, or a closely related cybersecurity engineering discipline. Experience integrating security into software development lifecycle activities, including requirements, architecture, implementation, testing, build, deployment, and sustainment. Experience performing threat modeling, application or API security reviews, security architecture reviews, or secure design assessments. Experience implementing or integrating security tooling into CI/CD pipelines, such as SAST, SCA, secret scanning, container scanning, or infrastructure-as-code analysis. Experience securing Linux-based systems, containerized applications, or Kubernetes-based deployment environments. Experience performing vulnerability assessments, analyzing findings, developing remediation guidance, and communicating technical risk. Experience developing scripts or automation using Python, Bash, PowerShell, or another applicable programming language. Working knowledge of OWASP application security risks and one or more security frameworks or baselines, such as NIST SP 800-53, NIST SP 800-171, CMMC, RMF, DISA STIGs, or CIS Benchmarks. Ability to work independently across multiple technical disciplines while collaborating effectively with engineering, cybersecurity, program, and customer stakeholders. Strong written and verbal communication skills, including the ability to document technical decisions and explain security risks, recommendations, and tradeoffs. Ability to obtain and maintain the public trust or security clearance required by assigned programs. Active certification meeting applicable DoD 8140 or customer requirements, or ability to obtain the required certification within 6 months of employment. 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: August 5, 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 $87,100.00 - $157,450.00 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. Apply To this Job