SME Information System Security Engineer Lead

Leidos Digital Modernization sector is seeking an experienced SME Information System Security Engineer Lead to support the delivery, enhancement, and adoption of enterprise data and analytics products used across multiple DoD organizations. In this role you will work alongside government partners, engineers, and other industry teammates to translate operational and strategic requirements into scalable, production‑ready solutions, contribute directly to product planning, execution, and continuous improvement, and help ensure capabilities are delivered efficiently and aligned with mission priorities.

• Lead the implementation of information security architectures and functionality to ensure uniform application of security policy across the enterprise.
• Validate and verify system security requirements and establish system security baseline designs for major system elements and all system interfaces.
• Establish, manage, operate, and maintain DoD RMF compliant processes and procedures for evaluating and authorizing changes to the system.
• Collect, review, assess, and provide feedback on system cybersecurity architecture and engineering artifacts.
• Collect, review, assess, and provide feedback on system cybersecurity Body‑of‑Evidence (BOE) results required to support the DoD RMF cybersecurity authorization process.
• Conduct periodic compliance scanning of the runtime system to meet all DoD periodic cybersecurity monitoring requirements.
• Support Government cybersecurity officials in preparing cybersecurity packages, including Interim Authority to Test (IATT), Authority to Operate (ATO), and Change Requests (CRs).
• Manage a team of 8–15 direct reports, providing leadership, mentorship, and performance evaluations.
• Develop and implement security policies, standards, and procedures to ensure compliance with DoD regulations.
• Coordinate with cross‑functional teams to ensure security measures are integrated into the system development lifecycle.
• Provide technical expertise and guidance on cybersecurity best practices and risk management.
• Oversee the development and maintenance of security documentation and reports.
• Ensure continuous improvement of security processes and procedures.
• Conduct security assessments and audits to identify vulnerabilities and recommend mitigation strategies.
• Stay current with emerging security threats and technologies to ensure the system remains secure and compliant.

• Bachelor’s degree or higher from an accredited college or university or relevant DoD 8140 Training Repository listings, CISM, CASP, or CISSP‑ISSMP/GSLC certification.
• Minimum of 10 years of experience in information security engineering or related field.
• Experience with DoD Risk Management Framework (RMF) and NIST 800‑53 Rev 4 or Rev 5.
• Experience in managing and leading a team of cybersecurity professionals.
• Strong understanding of cybersecurity principles, practices, and technologies.
• Experience with compliance scanning and cybersecurity monitoring.
• Excellent communication and interpersonal skills.
• Ability to obtain and maintain a TS/SCI with CI Poly clearance.
• Experience in preparing cybersecurity packages, including IATT and ATO packages.
• Strong analytical and problem‑solving skills.

• Master’s degree in Cybersecurity, Information Technology, or related field.
• Experience with DoD systems and environments.
• Knowledge of JIE (Joint Information Environment) or similar frameworks.
• Experience with cloud‑based security solutions and architectures.
• Familiarity with advanced cybersecurity tools and technologies.
• Experience in developing and implementing security policies and procedures.
• Strong project management skills and experience with Agile methodologies.

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Pay and benefits are fundamental to any career decision. 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.

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.

February 18, 2026 – 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.