SAIC is seeking a skilled and motivated System Administrator in Colorado Springs, CO to join our team and play a key role in managing and advancing our IT infrastructure within a Department of Defense (DoD) environment. In this role, you will be responsible for maintaining robust, secure, and high-performing systems that support mission-critical operations. The ideal candidate brings hands-on experience with enterprise virtualization platforms (Nutanix, VMware, and/or Proxmox), Windows Server administration, and a working knowledge of DoD security compliance standards. You are someone who takes ownership, communicates clearly across teams, and thrives in a regulated, security-first environment. Responsibilities: • Install, configure, and maintain Windows Server environments, including Active Directory, Group Policy, and user permissions management. • Manage and optimize on-premises Type 1 hypervisor platforms (Nutanix, VMware, Proxmox) to ensure high availability and performance. • Implement and maintain system security controls in accordance with DoD standards and applicable STIGs/RMF requirements. • Monitor network performance, diagnose connectivity issues, and recommend improvements to infrastructure reliability. • Manage system patching and update cycles to maintain compliance, reduce vulnerabilities, and minimize operational downtime. • Administer and maintain backup and recovery technologies; conduct periodic validation of restore procedures. • Create and maintain thorough documentation of system configurations, procedures, and security policies. • Partner with cross-functional teams to evaluate, implement, and enhance system functionality and security posture. • Stay current on emerging technologies, industry best practices, and evolving DoD compliance requirements. Required Qualifications: • High school diploma/GED with 8+ years of equivalent hands-on experience in a system administration role OR Bachelor’s degree in Computer Science, Information Technology, or a related field with 5 years of relevant experience; Master and three years of more experience. • Demonstrated experience as a System Administrator in a DoD or similarly regulated, security-conscious environment. • Solid hands-on experience with VMware and/or other enterprise virtualization technologies. • Strong proficiency in Windows Server administration, including Active Directory and Group Policy. • Working knowledge of networking protocols, system security best practices, and IT infrastructure management. • Proficient in Windows Server administration, patching, and update management. • Experience with on-premises Type 1 hypervisors (Nutanix, VMware, Proxmox preferred). • Familiarity with enterprise collaboration and project management tools. • Understanding of DoD compliance frameworks, STIGs, and security hardening standards. • Experience with enterprise backup/recovery platforms and documented DR procedures. Required Certifications: • CompTIA Security+ (DoD 8570/8140 compliant). • Active TS/SCI clearance. Preferred Certifications (not required): • Microsoft Certified: Azure Administrator Associate. • Nutanix Certified Professional or VMware Certified Professional (VCP). • Cisco Certified Network Associate (CCNA). • CompTIA Security X (Formerly CASP +).