Systems Administrator with Security Clearance

Systems Administrator (TS/SCI w/ Full Scope Poly) Clearance: Top Secret with SCI eligibility and Full Scope Polygraph – Required Overview We are seeking an experienced Linux Systems Administrator to support large-scale government programs in a highly classified environment. This role involves administering enterprise Linux and virtualized systems while adhering to strict cybersecurity and compliance standards. You will work with cutting-edge technologies alongside a highly skilled team supporting critical national security missions. Required Skills & Qualifications Active TS/SCI with Full Scope Polygraph5+ years of Red Hat Enterprise Linux (RHEL) administration in an SCI-classified environmentVMware vSphere / ESXi 6.x or newer configuration and management experienceActive Directory administration and Group Policy (GPO) experienceDoD 8570 IAT Level II certification (e.g., Security+ CE, CISSP)Ability to support after-hours and weekend operations as required Primary Responsibilities Perform Linux System Administration on large government contractsAdminister and support VMware virtualization technologiesMaintain reliable operation of multi-user systems in coordination with: Network, software, and system engineersDesktop techniciansProject managers, end users, and IT leadership Recommend and implement system enhancements to improve performance, reliability, and securityPerform system patching, upgrades, monitoring, troubleshooting, and configuration managementManage backups, recovery operations, file systems, disk space, and virus protectionCreate, modify, and maintain user and computer accounts, permissions, and access controlsTest and validate new software releases to ensure compatibility and minimize user impactDevelop and maintain technical documentation, processes, and proceduresInterface with vendors to troubleshoot issues and evaluate products and servicesEnsure compliance with all Information Systems Security requirementsMaintain security audit logs per ISSM directionPrepare required security documentation for Cybersecurity teams Nice-to-Have / Preferred Qualifications Degree in a STEM-related disciplineExperience operating within NISPOM Chapter 8, RMF, ICD 503, DCID 6/3, JAFAN, or JSIGNAS storage administration experience (preferably NetApp ONTAP 8.x+ / CDOT)Enterprise storage knowledge including RAID architecturesLinux hardening and vulnerability remediation using STIGs and RMFHost-based firewall configuration (e.g., iptables)Identity Management / Single Sign-On experienceWindows 10 and Windows Server administrationExperience with Splunk, Tenable, Nessus, VMware and NetApp maintenance and upgradesStrong documentation skills using Wiki and SharePointAdditional DoD 8570 certifications (Linux, Windows, or network platforms) Employee Value PropositionJoin a large government integrator supporting critical national security missions in Denver, CO. Work in a classified environment leveraging cutting-edge technologies alongside experienced engineers and cybersecurity professionals. Pay and Benefits Eligibility requirements apply to some benefits and may depend on job classification and length of employment. Benefits are subject to change and may be subject to specific elections, plan, or program terms. If eligible, benefits for this temporary role may include: Medical, dental, and vision insuranceCritical Illness, Accident, and Hospital coverage401(k) Retirement Plan (Pre-tax and Roth post-tax contributions available)Life Insurance (Voluntary Life & AD&D for employee and dependents)Short- and long-term disabilityHealth Spending Account (HSA)Transportation benefitsEmployee Assistance ProgramTime Off / Leave (PTO, Vacation, or Sick Leave)