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# Senior Information System Security Officer (ISSO)

- **Company:** Applied Information Sciences, Inc.
- **Location:** Washington, DC, United States
- **Experience:** Expert
- **Salary:** $101,000 - $152,000
- **Contract:** Permanent contract
- **Skills:** Information Systems, Information Security Management, Intrusion Detection and Prevention, Information Systems Security Architecture Professional, Network Diagrams, Nmap, HP WebInspect, Information Technology, Tenable Nessus, Patch Management, Splunk, Service Stack
- **Published:** November 13, 2026
- **Apply:** https://www.clearancejobs.com/jobs/9311389/senior-information-system-security-officer-isso

## About the Role

* Minimum 7 years of experience serving as an ISSO or Information System Security Engineer in a cleared facility.
 * Minimum 9 years of work experience in a computer science or cybersecurity-related field.
 * Familiarity with security tools such as Tenable Nessus/Security Center, Splunk, IBM Guardium, HP WebInspect, NMAP, or similar applications.
 * Must possess at least one of the following certifications:
 + CISM
 + CISSO
 + CISSP, * Bachelor's and/or advanced degree in Computer Science, Business Management, IT, or a related discipline preferred.

Clearance: Top Secret; specific assignments may require TS/SCI eligibility and a polygraph.

## Description

At AIS, we are dedicated to providing our employees with diverse opportunities to grow their careers while supporting a variety of impactful projects. For this position, we are seeking a talented individual to join AIS as a Senior Security Engineer.

 * Core Knowledge & Skills: Designs secure architectures, leverages advanced threat detection, leads incident response, and implements security automation.
 * Work & Complexity: Manages complex incidents, conducts threat analysis, leads audits, and implements process improvements.
 * Quality & Independence: Delivers high-quality reports, aligns practices with industry standards, and operates with high autonomy.
 * Teamwork & Communication: Leads team projects, collaborates cross-functionally, mentors juniors, and resolves conflicts.
 * Consulting & Engagement: Provides strategic consulting, leads improvement initiatives, recommends advanced technologies, and manages vendor relationships., The Senior Information System Security Officer supports the security and authorization of information systems throughout their lifecycle. The position works closely with system owners and technical personnel to ensure systems meet applicable security requirements, maintain an accurate security posture, and achieve and maintain Authorization to Operate (ATO). The Senior ISSO may also serve as a Task Lead and provide ISSO coverage for additional systems as needed., * Support documentation, testing, and ongoing review of information system security controls.
 * Ensure systems are fully scoped and all components and technology stacks are accurately inventoried.
 * Clearly document and articulate implementation of assigned security controls.
 * Support preparation, review, and maintenance of Security Assessment and Authorization documentation and risk assessments.
 * Support timely achievement and maintenance of system ATOs.
 * Maintain current RMF artifacts, POA&Ms, system boundary documentation, data flow diagrams, network diagrams, and hardware/software inventories.
 * Support continuous monitoring and vulnerability and patch management activities.
 * Ensure systems that are no longer required are appropriately retired, canceled, or decommissioned.
 * Coordinate with system owners, technical teams, and security stakeholders to resolve security and authorization issues.
 * Serve as a Task Lead and provide ISSO support for additional systems as needed.