Information System Security Officer

Leidos Dynetics CIS Team, reporting through the Digital sector, is seeking a talented Information System Security Officer (ISSO) to join a diverse team to create unique solutions for complex problems. With offices across the United States engaging in the defense, space, cyber and commercial fields, Leidos provides responsive, cost-effective engineering, scientific and IT solutions.

In this role, you will be responsible for supporting our Classified Information System Cybersecurity/Information Assurance Program. You will report to the Information System Security Manager (ISSM) on all aspects of classified information system security compliance.

Location: All work will be performed on site in Huntsville, AL.

Clearance: You must hold an active Top Secret clearance eligibility to obtain SCI eligibility and undergo a Polygraph clearance investigation post hire.

Primary Responsibilities

Assessing and monitoring system compliance, auditing, security plan development and delivering information systems security education and awareness

Investigating information system security violations and help prepare reports specifying corrective and preventative actions

Conducting technical and administrative assessments

Integrating new cybersecurity processes, procedures, and tools

Supporting the creation, review and update of cybersecurity documentation and other technical writing

Managing the day-to-day compliance of our classified information systems by:

Auditing information systems to ensure compliance with security policies and procedures while reporting any discrepancies to the ISSM, ISO or FSO.

Assisting in the Risk Management Framework (RMF) authorization process by developing and maintaining artifacts for the IS Body of Evidence (BoE).

Reviewing and approving (within authority) Configuration Management (CM) requests of all associated hardware, software, and security relevant functions is maintained and documented as part of CCB approval process.

Assisting with sanitization and release of hardware in accordance with security policies or Authorizing Official (AO) guidance.

Testing/evaluation and application of required technical security controls and periodic inspections of information systems.

Basic Qualifications

BS degree and at least 4 years of applicable, relevant experience in a computer-related discipline.

Must currently hold an active Top Secret clearance to be considered, with the ability to obtain SCI clearance and undergo a Polygraph investigation if hired.

Must hold current DoD 8140/8570 IAT II (Security+ce or equivalent).

Relevant Experience Considered:

Cybersecurity, systems security or hardening, Information Technology

Compliance-based auditing using the Risk Management Framework (RMF), DCSA Assessment and Authorization Process Manual (DAAPM), National Industrial Security Program Operating Manual (NISPOM) or Joint Special Access Program (SAP) Implementation Guide (JSIG)

Experience working with and/or supporting computer technologies (such as: databases, operating systems, computer network hardware, software programs, hardware troubleshooting or electronics)

Physical security, project or program management, office management, senior administration, or account management

Experience with security configurations across multiple operating systems in various environments, to include Windows, Linux, UNIX, utilizing Active Directory/Group Policy, Centrify, etc. is required.

Highly organized and self-motivated with excellent documentation skills and the ability to work with minimal supervision.

Preferred Qualifications

Experience with IT (Windows, Linux) is preferred.

Experience working in DoD classified operating and/or laboratory environments

Experience with various information system security tools that address vulnerability analysis and mitigation. These may include Solarwinds, Tenable, SCAP.

Familiarity with implementation of Government directives and policies derived from NIST, STIG, DoD, or other Government Regulatory compliance standards within a professional industry

Experience in the execution of the Assessment & Authorization processes, as defined within the Risk Managed Framework (RMF)

Experience providing technical security consultation for complex, cross-domain, heterogeneous classified networked environments in collaboration with internal/external Customers, Information Technology (IT)

Familiarity with the execution and management of cyber incident response; preservation, containment, and eradication

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: November 5, 2026

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 $87,100.00 - $157,450.00

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.