Senior Information System Security Officer
Listed on 2026-06-03
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IT/Tech
Cybersecurity, Information Security
Leidos offers a Senior Information System Security Officer (ISSO) position in Annapolis Junction, MD in the National Security Sector’s Cyber & Analytics Business Area.
Senior Information System Security Officer (ISSO)As an ISSO, the selected candidate will act as a security professional for a large software development program that includes software maintenance and development, IT support, systems integration and lifecycle support, enterprise application development, network engineering, and information systems security.
PrimaryRoles and Responsibilities
- Provide support for implementing and enforcing information systems security policies, standards, and methodologies.
- Assist in the evaluation of security solutions to ensure they meet security requirements for processing multiple types of information.
- Assist with configuration management for information system security software, hardware, and firmware.
- Analyze threats and develop and implement best practice methodologies for incident detection, reporting, and vulnerability remediation.
- Maintain records on workstations, servers, routers, firewalls, intelligent hubs, network switches, etc. to include system upgrades.
- Evaluate security solutions to ensure they meet security requirements for processing information.
- Maintain operational security posture for information systems.
- Provide support to the Information System Security Manager (ISSM) for maintaining the appropriate operational IA posture for a system/program/enclave.
- Develop and maintain documentation for Certification & Accreditation in accordance with specified policies.
- Develop and update system security plans and other IA documentation.
- Provide support for Information Assurance Vulnerability Alerts (IAVAs) management (initiating IAVA responses and system security scans, completing remediation, extending IAVA patches and security updates to designated sites, etc.).
- Provide configuration management for security-relevant information system software, hardware, and firmware.
- Develop system security policy and ensure compliance.
- Administer the user identification and authentication mechanisms of the Information System.
- Bachelor’s degree in a related field and at least 12 years of relevant experience. Additional experience may be substituted for a degree.
- TS/SCI with polygraph security clearance.
- At least 10 years of experience as ISSO working independently, and/or on teams maintaining secure information system operations in isolated, connected and standalone environments.
- At least 5 years of experience using tools to support IAVA management.
- At least 5 years of experience using tools to support the preparation, maintenance, and management of SSPs and other security related documentation.
- Demonstrated knowledge of and experience with several of the following: current security tools; hardware/software security implementation; communication protocols; encryption techniques/tools.
- In‑depth experience completing security evaluations of software systems or architectures to ensure they meet security requirements.
- In‑depth experience proposing, coordinating, implementing, and enforcing information systems security policies, standards, and methodologies, preferably on a large software or IT program.
- Demonstrated experience performing day‑to‑day security operations of large, complicated information and information processing systems.
- Must be committed to developing and adhering to best practices.
- Must possess a high level of self‑initiative and must be a solutions‑oriented team player.
- Must have excellent interpersonal skills.
- Extensive experience as an Information Systems Security Officer on large software development and integration programs.
- DoD 8570 compliance with IAT Level II or higher.
- DoD 8570 compliance with IAM Level II or higher.
- Paid Time Off
- 11 paid Holidays
- 401K with a 6% company match and immediate vesting
- Flexible Schedules
- Discounted Stock Purchase Plans
- Technical Upskilling
- Education and Training Support
- Parental Paid Leave
- And more
Pay Range: $ - $.
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.
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