Senior Information System Security Officer (ISSO)

Description

Leidos National Security Sector combines technology-enabled services and mission software capabilities in the areas of cyber, logistics, security operations, and decision analytics to support our defense and intel customers' mission to defend against evolving threats around the world. Our team's focus is to ensure our customers have the right tools, technologies, and tactics to keep pace with an ever-evolving security landscape and succeed in their pursuit to protect people and critical assets.

The Intelligence Production Solutions Division (IPSD), part of the Decision Advantage Solutions Business Area, is currently seeking an Information System Security Officer (ISSO) for the Chinook Program. The ISSO will be responsible for managing the authorizations and risks related to the processing, storage, and transmission of information for one or more programs within the Analysis Sustainment portfolio. The ISSO is responsible for meeting regulatory and non-regulatory compliance (security best practices) demands, providing leadership over security assessment activities, working across system ownership and management organizations to test security controls, policies, and procedures, providing program management support, team leadership, and participating in and coordinating the support as needed for security assessment and activities The ISSO also manages and enforces government and corporate information security policies, provides training, and educates end users and program staff about proper security practices.

The ISSO conducts security and risk assessments as required using a range of security accreditation frameworks (e.g., NIST, RMF, Common Criteria, DoD, the Intelligence Community Directives (ICDs)),and works to mitigate risks by applying security controls effectively to achieve an acceptable degree of operational risk. As part of this process, the ISSO performs testing and security assessments to sustain required accreditations. The ISSO promotes the use of secure hardware and software within the systems affected by government and corporate approval standards. The ISSO works to ensure all required security policies and practices are effectively applied to systems and ensures security controls implementing these policies are applied and achieve the proper levels of confidentiality, integrity, availability, and privacy protection throughout the system life cycle.

The ISSO also assists with the execution, analysis, and remediation activities for the vulnerability management program (scanning, assessment, reporting, and mitigation verification) that spans different accreditation entities, three distinct classification domain enclaves (U), (S), and (TS), using the Nessus and Tenable-ACAS vulnerability scanning tools.

Position may be performed in the following locations below. Please note Gaithersburg, MD is the program's primary work location.

• Gaithersburg, MD
• Alexandria, VA
• Chantilly, VA
• Aurora, CO
• St. Louis, MO
• Tucson, AZ

Clearance Level Required :

Top Secret with the ability to obtain SCI, as well as a Polygraph.

Primary Responsibilities :

Basic Qualifications :

XACTA

Preferred Qualifications :

#Chinook

Come break things (in a good way). Then build them smarter.

We're the tech company everyone calls when things get weird. We don't wear capes (they're a safety hazard), but we do solve high-stakes problems with code, caffeine, and a healthy disregard for "how it's always been done."

Original Posting : October 9, 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 onlyand 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.