Information System Security Officer (ISSO)

About the Role

The Defense Sector at Leidos is seeking an Information System Security Officer (ISSO) to support the Air Force Life Cycle Management Center. This role is 100% on-site.

Key Responsibilities

• Collaborate daily with the ISSM to provide expert cybersecurity guidance and recommendations.
• Support the development, implementation, and maintenance of security policies, procedures, and documentation to ensure compliance with DoD security standards and regulations (e.g., NIST, RMF, FISMA, JSIG).
• Oversee the security posture of DoD information systems, ensuring they meet cybersecurity requirements for confidentiality, integrity, and availability.
• Perform risk assessments, vulnerability assessments, and security audits to identify system vulnerabilities and provide remediation strategies.
• Manage and conduct continuous monitoring of security controls, ensuring the protection of classified and unclassified data.
• Coordinate with cross-functional teams (engineering, IT, operations) to implement and enforce security protocols and best practices.
• Ensure the accreditation process for DoD systems (e.g., RMF accreditation) is completed and continually maintained in compliance with all applicable requirements.
• Act as the primary point of contact for security-related issues, assisting in incident response and reporting to senior management and government customers.
• Provide security training and awareness programs for personnel involved in the operation of DoD systems.
• Maintain and track security documentation, including system security plans (SSPs), risk assessments, and Plan of Actions & Milestones (POA&Ms).
• Stay current with emerging cybersecurity threats, vulnerabilities, and trends to ensure the program adapts to evolving security challenges.

Requirements & Tech Stack

• US Citizen with at least an active Top Secret Clearance with the ability to obtain an SCI prior to your start date.
• Bachelor’s degree with 4+ years of experience or a Master’s degree with 2+ years of experience. Additional experience may be considered in lieu of a degree.
• In-depth knowledge of DoD cybersecurity policies, frameworks, and compliance standards (e.g., NIST 800-53, RMF, FISMA, ICD 503/705, JSIG, DAAPM).
• In-depth experience with cloud computing and building/maintaining an ATO for cloud-based information systems.
• Must have a DoD 8140 Intermediate certification (e.g., Cloud+, Security+, etc.).
• Experience with system security engineering, risk management, and vulnerability assessments.
• Strong understanding of network security, security controls, and common cybersecurity tools (e.g., firewalls, IDS/IPS, SIEM, endpoint protection).
• Ability to work independently and collaborate effectively with cross-functional teams.
• Strong communication skills, including the ability to create and present detailed security reports to stakeholders.
• Interest in continuous learning and professional development in cybersecurity.

Preferred Qualifications

• US Citizen with an active TS/SCI security clearance.
• DoD 8140 Advanced certification (e.g., CISSP, CISM, etc.).
• Experience with JSIG implementation of the Risk Management Framework (RMF) for DoD system accreditations and continuous monitoring processes.
• Experience in managing security for complex DoD programs or mission-critical systems.
• Familiarity with cloud security practices and systems, particularly in a hybrid or government cloud environment.
• Experience with security tools for vulnerability scanning, penetration testing, and security auditing.
• Cloud security certifications (e.g., Azure Security Technologies or AWS Certified Security Specialty).
• Experience with configuration management and change management processes in a secure environment.