Information System Security Officer - ISSO

Information System Security Officer - ISSO

Job
Location: SAN ANTONIO, TX, United States
Date Posted: Nov 13, 2025
Category: Cyber
Subcategory: Cybersecurity Spec
Schedule: Full-time
Shift: Day Job
Travel: Yes, 10 % of the Time
Minimum

Clearance Required:

Top Secret
Clearance Level Must Be Able to Obtain: None
Potential for Remote Work: On-Site
Benefits:

We are seeking an experienced Information System Security Officer (ISSO) with expertise in Department of Defense (DOD) compliance standards and a strong familiarity with NIST (National Institute of Standards and Technology) RMF (Risk Management Framework) and the Authority to Operate (ATO) process. In this role, you will be responsible for ensuring the security and compliance of information systems within a DoD environment.

• DoD Compliance:
  Coordinate and execute efforts to ensure that information systems, processes, and organization policy comply with Department of Defense (DOD) cybersecurity and regulatory requirements and standards. This includes DoD 5400 Series, NIST SP 800-53, NIST SP 800-37, NIST SP 800-60, and FIPS 140-2, with some level of awareness regarding Trade Agreement Act (TAA) and Clinger Cohen Act (CCA) compliance.
• ATO:
  Assist in the management of the Authorization to Operate (ATO). Collaborate with relevant stakeholders to ensure timely and successful processing of eMASS (Enterprise Mission Support Service) workflows. This includes preparing and submitting artifacts, conducting security assessments, and liaising with the Authorizing Official (AO) SCA (Security Control Assessor) Team.
• Security Assessments:
  Perform risk and vulnerability assessments on information systems and software to identify weaknesses. Utilize ACAS (Assured Compliance Assessment Solution) and/or Tenable, Inc. products to provide mitigation and/or remediation guidance to applicable stakeholders.
• Security Documentation:
  Coordinate and collaborate with DCWF (Defense Cyber Workforce) personnel to develop, update, and continuously monitor security documentation, including but not limited to System Security Plans (SSPs), Security Assessment Reports (SARs), Plan of Action and Milestones (POA&Ms), security control implementation plans, and assessment procedure test results.
• Security Awareness:
  Promote a culture of cybersecurity awareness by educating staff and stakeholders about emerging cybersecurity policies and best practices. Adhere to DoD 8140 guidelines to ensure cybersecurity training and awareness programs remain active and all DCWF personnel remain on their compliance roadmap.
• Incident Response:
  Contribute to the creation, implementation, continuous monitoring, and annual testing of the Incident Response Plan (IRP). Participate in incident response activities as necessary.
• Continuous Monitoring:
  Collaborate in maintaining the continuous monitoring strategy; assist in the observation and analysis of detected threats and/or compliance violations.
• Collaboration:
  
  Collaborate with cross-functional teams, including IT, engineering, software development, and AI/data collection teams to ensure security requirements are integrated into system designs and processes.

• 5 Years and Bachelor's or relevant years of experience in lieu of degree.
• Intermediate or Advanced 8140 Certificates one or more of the following:
  Intermediate:
  Sec+, SSCP, GSEC, CGRC/CAP, CCSP, CCISO, CASP+ Advanced: CISM, CISSO, CISSP, CISSP-ISSMP, GCIA, GCIH, GCSA, GICSP, GSLC.
• Minimum of 3 years of experience as an ISSO or in a similar role.
• In-depth knowledge of DOD compliance standards, including NIST, RMF, and DODI 8500 Series.
• Proven experience in executing ATO processes and achieving ATO approvals.
• Familiarity with cybersecurity tools such as eMASS, SCAP, STIGs, MDE, MDfS, MS Sentinel and ACAS.
• Strong analytical and problem-solving skills.
• Excellent written and verbal communication skills.
• US Citizen and active Top Secret Clearance.

SAIC accepts applications on an ongoing basis and there is no deadline.

SAIC® is a premier Fortune 500® mission integrator focused on advancing the power of technology and innovation to serve and protect our world. Our robust portfolio of offerings across the defense, space, civilian and intelligence markets includes secure high-end solutions in mission IT, enterprise IT, engineering services and professional services. We integrate emerging technology, rapidly and securely, into mission critical operations that modernize and enable critical national imperatives.

We are approximately 24,000 strong; driven by mission, united by purpose, and inspired by opportunities. SAIC is an Equal Opportunity Employer. Headquartered in Reston, Virginia, SAIC has annual revenues of approximately $7.5 billion. For more information, visit  For ongoing news, please visit our newsroom.

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