> Markdown version of [/jobs/ext/572595-sr-principal-cyber-systems-administrator](https://www.wearedevelopers.com/jobs/ext/572595-sr-principal-cyber-systems-administrator). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Sr Principal Cyber Systems Administrator - **Company:** Northrop Grumman - **Location:** Chantilly, VA, United States - **Experience:** Expert - **Salary:** $129,300.0 - $193,900.0 - **Contract:** Permanent contract - **Skills:** Microsoft Windows, Active Directory, Application Layers, User Authentication, Linux, Domain Name System (DNS), Elasticsearch, Linux Servers, Packet Analyzer, Zero Trust Network Access, System Testing, Wireshark, VMware Infrastructure, Virtualization Technology, VMware VSphere, Software Vulnerability Management, Data Logging, Computer Networking Systems, Nessus, McAfee EPolicy, User Administration, Vulnerability Analysis - **Published:** June 5, 2026 - **Apply:** https://dejobs.org/x/x/CCCAC5BBB2A74CA98EC3E1C5F43917CF/job/ ## About the Role The successful candidate should thrive in a fast-paced, quick response, work environment with high expectations, diverse assignments, and possess the ability to communicate and collaborate with multiple teams across all technical levels. The candidate must be able to lead the way to maintain and develop creative solutions to complex problems., * Active TS/SCI is required to start; with willingness to receive a polygraph * 8 Years with Bachelor's Degree; 6 Years with Masters; 4 Years with PhD; OR 12 years of experience in lieu of a degree. * Security+ certification required * 5+ years of experience administering Windows and Linux enterprise environments with CLI experience * Experience with Active Directory, DNS, certificates, and account management * Experience performing patching, maintenance, and vulnerability remediation * Experience supporting enterprise virtualization environments such as VMware vSphere * Experience with independent troubleshooting skills across systems and networking * Experience writing SOPs and technical implementation documentation * Ability to support 24/7 operational environments and escalation support * Willingness to travel 5-10% Preferred Qualifications: * Active TS/SCI with Polygraph * Experience with Elastic Stack / enterprise logging platforms * Experience with MFA and RADIUS * Experience with Wireshark packet analysis * Experience with Nessus Security Center * Experience with McAfee ePolicy Orchestrator / HBSS * Experience implementing new enterprise capabilities driven by cybersecurity or mission requirements * Experience supporting Zero Trust Architecture (ZTA) initiatives ## Description * Administer and maintain Windows and Linux server environments * Perform monthly patching, vulnerability remediation, and maintenance activities * Support and maintain existing enterprise infrastructure, including virtualization, logging, authentication, and security systems * Monitor system health, performance, and security events to ensure operational availability * Provide Tier 2 / Tier 3 support for operators and junior administrators * Troubleshoot complex issues across systems, network, security, and application layers * Maintain Active Directory, account provisioning, group policy, DNS, certificates, and access controls * Support authentication services including RADIUS and MFA platforms * Maintain enterprise logging, monitoring, and alerting solutions such as Elastic Stack * Support virtual infrastructure administration using VMware vSphere * Develop and update SOPs, technical documentation, and implementation procedures * Prepare technical change documentation for Change Control Board (CCB) review * Support system hardening, compliance, and vulnerability scanning using tools such as Nessus and Trellix ePolicy Orchestrator * Assist the ISSM with system testing, use case validation, and security compliance efforts * Evaluate and implement new technical solutions in response to emerging mission or cybersecurity requirements (for example, Zero Trust Architecture initiatives) * Support limited travel (5-10%) for system installs, upgrades, or remote site support ## Related Videos - [What makes Cybersecurity different for critical infrastructure?](https://www.wearedevelopers.com/videos/571-what-makes-cybersecurity-different-for-critical-infrastructure) - [How I saved 200K/yr in direct costs writing 0 code lines in K8s](https://www.wearedevelopers.com/videos/1055-how-i-saved-200k-yr-in-direct-costs-writing-0-code-lines-in-k8s) - [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) - [MySQL Protocol Features You Should Be Aware Of](https://www.wearedevelopers.com/videos/100267-mysql-protocol-features-you-should-be-aware-of) - [Docker exec without Docker](https://www.wearedevelopers.com/videos/1094-docker-exec-without-docker) ## Related Articles - [9 Ways to Make Money Hacking](https://www.wearedevelopers.com/magazine/333-9-ways-to-make-money-hacking) - [Dev Digest 134 - Where pixels sing?](https://www.wearedevelopers.com/magazine/477-dev-digest-134-where-pixels-sing) - [What Are The Top Skills Required For Azure Developers?](https://www.wearedevelopers.com/magazine/77-what-are-the-top-skills-required-for-azure-developers) - [Best Paying Jobs in Technology](https://www.wearedevelopers.com/magazine/256-best-paying-jobs-in-technology) - [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated)