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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Cyber Network Defender (ISSO) - **Company:** General Dynamics Mission Systems, Inc. - **Location:** San Antonio, TX, United States - **Experience:** Expert - **Salary:** $101,357.0 - $109,672.0 - **Contract:** Permanent contract - **Skills:** Microsoft Windows, Cyber Security, Linux, Identity and Access Management, Security Information and Event Management, Nessus, National Industrial Security Program Operating Manual (NISPOM), Splunk, Scap Compliance Checker, Vulnerability Analysis, Vmware - **Published:** August 24, 2026 - **Apply:** https://jobs.localjobnetwork.com/apply/add/88133955/1 ## About the Role Bachelor's degree in a related specialized area or equivalent relevant experience is required, plus a minimum of 5 years of relevant experience; or Master's degree, plus a minimum of 3 years of relevant experience., Department of Defense Top Secret clearance with SCI eligibility with ability to obtain a Polygraph is required at time of 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 ICD 503, NISPOM, NIST, and DIACAP. * Ability to provide RMF support and conduct security certification tasks. What Sets You Apart: * Strong experience with utilizing SIEM tools like SPLUNK with creation of SPLUNK dashboards. * Strong technical knowledge of Linux and Windows commands and utilities. * Expertise in security tools such as SCAP Compliance Checker and Clearswift. * 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. ## Description General Dynamics Mission Systems has an immediate opening for a Cyber Network Defender (ISSO). This position provides an opportunity to further advance the cutting-edge technology that supports some of our nation's core defense/intelligence services and systems. General Dynamics Mission Systems employees work closely with esteemed customers to develop solutions that allow them to carry out high-stakes national security missions. Role and Position Objectives: Join our team as a Cyber Network Defender (ISSO) for Space, Cyber and Intelligence Systems! You'll be part of a versatile team managing the entire Cyber lifecycle, from governance and policy to accreditation, continuous monitoring, and incident response. What You'll Experience: * 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., * Continuous learning and development opportunities. * Working with award-winning teams on impactful research projects. * Competitive benefits include 401k matching, flex time off, healthcare, and wellness programs. * A supportive and engaging work environment with various employee resource groups. INTERFACE: * Primary interfaces are Government Program Information Systems Security Manager (ISSM), Operational Team Leads, internal customers, external customers, suppliers * Establish and maintain a strong working relationship with all team members and across all teams A minimum of an IAM Level II or IAT Level II/III (DoD 8570/8140.01) certification is required at time of hire. ## Related Videos - [Our journey with Spring Boot in a microservice architecture](https://www.wearedevelopers.com/videos/511-our-journey-with-spring-boot-in-a-microservice-architecture) - [Docker network without Docker](https://www.wearedevelopers.com/videos/1418-docker-network-without-docker) - [Security Pitfalls for Software Engineers](https://www.wearedevelopers.com/videos/726-security-pitfalls-for-software-engineers) - [Docker exec without Docker](https://www.wearedevelopers.com/videos/1094-docker-exec-without-docker) - [Checkmate: 5 Real Incidents That Can End a Software Company](https://www.wearedevelopers.com/videos/100126-checkmate-5-real-incidents-that-can-end-a-software-company) - [Discover the open source trio you didn’t expect: .NET and PostgreSQL on Linux](https://www.wearedevelopers.com/videos/2042-discover-the-open-source-trio-you-didn-t-expect-net-and-postgresql-on-linux) ## Related Articles - [Events like RSAC Get You CISOs. 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