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# Network Defense Analyst (ISSO)

- **Company:** General Dynamics Mission Systems, Inc.
- **Location:** Fort Belvoir, VA, United States
- **Salary:** $97,771
- **Contract:** Permanent contract
- **Skills:** Microsoft Windows, Cyber Security, Computer Networks, Linux, Identity and Access Management, Network Security, Information Technology, Nessus, National Industrial Security Program Operating Manual (NISPOM), Splunk, Scap Compliance Checker, Vulnerability Analysis, Vmware
- **Published:** November 12, 2026
- **Apply:** https://www.careerbuilder.com/job-details/network-defense-analyst-isso-fort-belvoir-va--8214134b-c40d-479b-8168-fcd16144e444

## About the Role

Network Security, Computer Network Defense (CND), Network Performance/Analysis, Top Secret Clearance, Sensitive Compartmented Information (SCI), United States Citizen, Computer Systems, Computer Network Defense (CND), Access Control, Systems Maintenance, Master's degree. Bachelor's degree in a related specialized area or equivalent relevant experience is required, plus a minimum of 2 years of relevant experience; or

CLEARANCE REQUIREMENTS:Department of Defense TS/SCI security clearance required at time of hire. Applicant must be able to acquire clearance level to TS/SCI with Polygraph in a reasonable amount of time after hire. Applicants selected will be subject to a U.S. Government security investigation and must meet eligibility requirements for access to classified information. Due to the nature of work performed within our facilities, U.S. citizenship is required., * Proficiency in Linux and Windows operating systems.

 * Experience with Risk Management Framework (RMF) and vulnerability analyses.
 * Familiarity with IT government security standards like JSIG, ICD 503, NISPOM, NIST, and DIACAP.
 * Ability to provide RMF support and conduct security certification tasks.
 * Experience with Incident Response procedures and reports.
 * Experience with preparing, reviewing, and submitting Cybersecurity documentation for classified programs.

What sets you apart:

 * Strong technical knowledge of Linux and Windows commands and utilities.
 * Previous experience working and supporting a JSIG policy managed environment.
 * Expertise in security tools such as SCAP Compliance Checker, ACAS Scans, and SPLUNK.
 * In-depth understanding of government IT security policies and directives.
 * Hands-on experience with security accreditation and certification processes.
 * Ability to ensure all security IA service requirements are met.

Required:

Current CISSP certification preferred or other DoD 8570.1/8140 IAM-II or IAT-II or above certification day one on contract.

Education Requirements:

Bachelor's degree in a related specialized area or equivalent is required plus a minimum of 2 years of relevant experience; or Master's degree plus a minimum of 0 years of relevant experience

Clearance Requirements:

This position requires an active TS/SCI security clearance. Must be willing and able to obtain a polygraph within a reasonable amount of time after hire, with acceptable timing determined by manager. Applicants selected will be subject to a U.S. Government security investigation and must meet eligibility requirements for access to classified information. Due to the nature of work performed within our facilities, U.S. citizenship is required.

## Description

As the Advanced IT Security Specialist working as part of the Cyber Team as an Network Defense Analyst (ISSO), we'll rely on you to apply defensive functions (e.g., encryption, access control, identity management) to reduce exploitation opportunities of vulnerabilities, as well as conduct import/export reviews for acquiring cryptographic systems. You'll also apply current computer science technologies to the design, development, evaluation, and integration of computer systems and networks to maintain system security. Are you ready to make a difference?

What you'll experience:

 * Technologies that aren't just top-notch, they're often top-secret
 * A team of bold thinkers committed to exploring what's next
 * Opportunities to gain new knowledge - as it's discovered
 * Overseeing the Cyber lifecycle, including risk management, vulnerability analysis, and continuous monitoring.
 * Ensuring compliance with government security requirements and DoD policies.
 * Utilizing tools like Splunk, Nessus, and VMware for security monitoring and analysis.
 * Conducting hands-on reviews and maintaining security configurations.