Information System Security Officer

Leidos has a new and exciting opportunity for an Information Systems Security Officer (ISSO) in our National Security Sector's (NSS) Cyber & Analytics Business Area (CABA). Our talented team is at the forefront in Security Engineering, Computer Network Operations (CNO), Mission Software, Analytical Methods and Modeling, Signals Intelligence (SIGINT), and Cryptographic Key Management. At Leidos, we offer competitive benefits, including 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 much more. Join us and make a difference in National Security!

Job Description

Leidos is seeking a proactive and adaptable ISSO to support cybersecurity operations in a collaborative, fast-paced environment. This role is critical to maintaining the security posture of information systems and ensuring compliance with federal standards. The ideal candidate will bring strong analytical skills, attention to detail, and the ability to coordinate across technical and security teams, while remaining flexible to support broader program needs.

Primary Responsibilities

• Support the ISSM in maintaining the operational Information Assurance (IA) posture across systems and enclaves.
• Review and approve change requests, audit logs, system accounts, and vulnerability scans.
• Maintain and monitor system security policies, procedures, and configurations.
• Perform daily security operations and assist in managing system security aspects.
• Prepare and review System Security Plans (SSPs), Risk Assessments, and A&A documentation.
• Coordinate with system administrators to remediate vulnerabilities and manage POA&M status.
• Provide configuration management for security-related software, hardware, and firmware.

Basic Qualifications

• Bachelor's degree in information security, Information Systems, Cybersecurity, Information Technology or related discipline and 8 years of related experience. in lieu of Bachelors Degree an additional 4 years of experience may be substituted in lieu of degree.
• Possess a current DoD 8570.01 compliant certification for IAM Level I or higher
• Understanding of the Risk Management Framework (RMF), National Institute of Standards and Technology (NIST) and Committee on National Security Systems (CNSS) cyber security requirements and guidance, cyber security related risk management techniques.
• Demonstrative experience preparing and maintaining SSP or security related documentation.
• Proven ability to manage compliance timelines and adapt quickly within dynamic regulatory environments.
• Prior experience as an ISSM, ISSO, System Administrator, or CSSO supporting DoD and DCSA security requirements.
• Strong interpersonal and communication skills; self-motivated and capable of working independently.
• Clearance Required: Must have an active TS/SCI with Polygraph

Preferred Qualifications

• Experience conducting security audits of information systems.
• Vulnerability assessment and analysis experience utilizing SCAP, NESSUS and DISA STIGs.
• Experience with DoD implementation of the Risk Management Framework (RMF) and governing directives (NIST, CNSS, DSS, etc.).

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:
October 1, 2025

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 $104,650.00 - $189,175.00

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.