Information System Security Officer (ISSO)

About the role

The Defense Sector at Leidos is seeking an Information Systems Security Officer (ISSO) to support a fast-paced program with the Air Force Life Cycle Management Center. This role involves supporting the delivery of comprehensive IT and support services to ensure mission success while adhering to DoD standards and regulations.

Responsibilities

• 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.
• Collaborate 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

• US Citizen with at least an active Top Secret security clearance with the ability to obtain a SCI prior to your start date.
• Bachelor’s degree with 8+ years of experience or a Master’s degree with 6+ years of experience.
• In-depth knowledge of DoD cybersecurity policies, frameworks, and compliance standards (e.g., NIST 800-53, RMF, FISMA, ICD 503/705, JSIG, DAAPM).
• 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.

Qualifications

• Experience supporting classified networks and possessing a strong understanding of RMF, vulnerability management, security architecture, system hardening, and incident response.
• Equally comfortable discussing risk with senior leaders, collaborating with engineers on technical solutions, and independently driving initiatives from concept to implementation.
• Self-starter who values trust, accountability, and continuous improvement.
• Takes pride in delivering high-quality work with minimal oversight, exercising sound judgment, and serving as a trusted cybersecurity advisor to both technical teams and leadership.

Skills

• Proficient technically and able to perform hands-on cybersecurity tasks.
• See security as a mission enabler, not a roadblock.
• Thrive in complex DoD environments and enjoy solving difficult security challenges while balancing operational requirements, compliance obligations, and mission success.

Benefits

Pay Range $107,900.00 - $195,050.00

Additional details about pay and benefits are available at www.leidos.com/careers/pay-benefits.

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.

About Leidos

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.

Securing Your Data

Beware of fake employment opportunities using Leidos' name. Leidos will never ask you to provide payment-related information during any part of the employment application process (i.e., ask you for money), nor will Leidos ever advance money as part of the hiring process (i.e., send you a check or money order before doing any work).

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.