> Markdown version of [/jobs/ext/2921947-senior-it-systems-administrator](https://www.wearedevelopers.com/jobs/ext/2921947-senior-it-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). --- # Senior IT Systems Administrator - **Company:** BAE Systems - **Location:** Merrimack, NH, United States - **Experience:** Expert - **Salary:** $97,008.0 - $164,914.0 - **Contract:** Permanent contract - **Skills:** Active Directory, Domain Controllers, Software Documentation, CompTIA Security+, Dynamic Host Configuration Protocol, Domain Name System (DNS), Intrusion Detection and Prevention, Python (Programming Language), Log Analysis, McAfee VirusScan, Windows PowerShell, SAP (Applications), VMware Infrastructure, VMware VSphere, Scripting, Sysadmin, Information Technology, Nessus, National Industrial Security Program Operating Manual (NISPOM), Veeam, Splunk, Plan of Action and Milestones, Vulnerability Analysis, Vmware - **Published:** September 15, 2026 - **Apply:** https://www.clearancejobs.com/jobs/9162730/senior-it-systems-administrator ## About the Role * US Citizenship. * Active U.S. Top Secret Security Clearance with SCI eligibility and CompTIA Security+ or equivalent DoD 8570 IAT Level II certification. * 5-7 years of experience (4+ years of experience with a degree) as a system administrator. * Direct experience configuring and managing Lab-in-a-Box (LIB) environments. * Familiarity with data spill response protocols and secure system sanitization. * Hands-on experience with Nessus, VMware vSphere, Veeam, and Trellix ePO. * Strong Active Directory experience, including domain controller and GPO management. * Working knowledge of Splunk in secure environments (including alerting and data retentionstrategies). * Understanding of DoD and IC security standards, including RMF, NISPOM, and STIG compliance. Preferred Education, Experience, & Skills * Active U.S. TS/SCI Security Clearance with CI Poly * 4+ years of experience working in a classified environment * Experience with system accreditation (e.g., SSP development, POA&M tracking). * Familiarity with classified lab setups, test bed environments, or R&D support. * Exposure to cross-domain solutions, enclave management, or SAP/SAR environments. * Scripting experience (PowerShell, Python) to automate common sysadmin tasks. * Experience supporting audit and inspection activities. ## Description * Proficiency in Active Directory, including user/group management, OU structure, and GPOs. * Configure, deploy, and maintain Lab-in-a-Box (LIB) environments used in closed area testing and mission scenarios. * Develop and execute system shutdown and secure wipe procedures, in accordance with DoD and agency guidelines. * Lead and coordinate data spill containment, response, and remediation actions in classified environments. * Operate and manage Nessus vulnerability scanning, assessment reporting, and risk remediation tracking. * Maintain and support VMware-based virtual infrastructure, including host management and resource allocation. * Operate and manage Veeam backup and recovery solutions for secure system images and restoration planning. * Administer Trellix ePO (McAfee) for endpoint protection policy management, signature updates, and alert resolution. * Perform domain controller maintenance, including replication, DNS/DHCP services, and health monitoring. * Design, implement, and troubleshoot Group Policy Objects (GPOs) in Active Directory. * Support Splunk operations, including forwarder management, dashboard/report creation, and log analysis for auditing and threat detection. * Ensure all systems are compliant with applicable STIGs, RMF controls, and cyber hygiene policies. * Maintain system documentation, configuration change records, and contribute to audit readiness. * Collaborate with ISSOs/ISSMs, facility security, and other stakeholders to ensure secure and compliant operations. ## 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) - [WebAssembly: The Next Frontier of Cloud Computing](https://www.wearedevelopers.com/videos/972-webassembly-the-next-frontier-of-cloud-computing) - [Security Pitfalls for Software Engineers](https://www.wearedevelopers.com/videos/726-security-pitfalls-for-software-engineers) - [Generating code with Angular schematics](https://www.wearedevelopers.com/videos/129-generating-code-with-angular-schematics) - [What makes Cybersecurity different for critical infrastructure?](https://www.wearedevelopers.com/videos/571-what-makes-cybersecurity-different-for-critical-infrastructure) - [The Developer Workstation Blind Spot: Why Your Security Stack Can't See What Matters Most](https://www.wearedevelopers.com/videos/100254-the-developer-workstation-blind-spot-why-your-security-stack-can-t-see-what-matters-most) ## Related Articles - [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again) - [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers) - [9 Ways to Make Money Hacking](https://www.wearedevelopers.com/magazine/333-9-ways-to-make-money-hacking) - [The Most Popular IT Jobs on the Market](https://www.wearedevelopers.com/magazine/376-the-most-popular-it-jobs-on-the-market) - [Best Paying Jobs in Technology](https://www.wearedevelopers.com/magazine/256-best-paying-jobs-in-technology) - [Dev Digest 134 - Where pixels sing?](https://www.wearedevelopers.com/magazine/477-dev-digest-134-where-pixels-sing)