Senior Linux Systems Administrator

Davidson has distinguished itself in the aerospace and missile defense industry with an outstanding reputation for excellence. Specifically, we're recognized for hiring noted experts, experienced engineers and scientists dedicated to designing and delivering advanced, intelligent technology solutions in defense of our Nation. Key Responsibilities Administer Windows10/11 clients and Windows Server2019/2022 hosts, including virtualization platforms (Hyper‑V/VMware). Manage Active Directory forests, OU structure, group policy, DNS, file sharing (SMB/CIFS) and NFS services. Develop and maintain PowerShell and batch scripts for provisioning, software deployment and remediation. Create and run Ansible playbooks for cross‑platform (Windows & RHEL) automation (bonus). Apply DISA STIGs, ACAS scan remediations and Evaluate‑STIG tools; perform security‑focused OS/software updates and hardening. Administer Microsoft Office 365, Teams, SharePoint and related services. Diagnose and resolve Windows OS, application and networking issues; provide Level2/3 support. Participate in Agile ceremonies (sprint planning, stand‑ups) and contribute to Git/GitLab repositories and CI/CD pipelines (bonus). Produce run‑books, SOPs and configuration documentation; mentor junior staff on hybrid Windows/Linux operations. Required Qualifications CompTIA Security+ (CE) certification or higher. 10years experience in Windows administration within a secure, multi‑OS environment. Proficiency with Windows10, Windows11, Server2019 and Server2022. Experience with AD, DNS, file sharing, group policy and NFS. Advanced PowerShell scripting and batch scripting skills. Patch management experience (WSUS, SCCM or equivalent). Familiarity with DISA STIGs, ACAS and Evaluate‑STIG processes. Strong written and verbal communication for documentation and stakeholder interaction. Ability and willingness to troubleshoot urgent, high-visibility issues Preferred (Bonus) Qualifications System administration experience with RedHat Enterprise Linux (RHEL) Experience designing and maintaining Ansible playbooks for Windows and RHEL. Participation in Agile development (Scrum/Kanban). Git/GitLab repository management and branching strategies. Involvement in DevOps pipelines (Jenkins, GitLab CI). Virtualization experience (VMware ESXi, KVM). Monitoring tools experience (Splunk, SolarWinds, Prometheus). Key Skills & Competencies Excellent problem‑solving and root‑cause analysis. Ability to work under strict security and compliance constraints. Collaborative mindset; works effectively with Linux, network, and security teams. Detail‑oriented documentation and change‑control processes. Continuous‑learning attitude for emerging Windows and hybrid‑cloud technologies. Clearance Must have an Active DoD Secret security clearance #J-18808-Ljbffr