Sr Principal Systems Administrator

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Sr Principal Systems Administrator

• Location: Aurora, Colorado 80017
• Work model: On-site
• Posted July 21, 2026
• Job ID: JPC - 206645

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Job Description

Sr Principal Systems Administrator - Aurora, CO (Onsite)

About the Role

Join a high-impact technical team as a Sr Principal Systems Administrator supporting mission-critical government programs in Aurora, Colorado. This onsite position offers the opportunity to work with advanced Linux, Windows, VMware, and NAS technologies while maintaining and enhancing secure multi-user computing environments. Contribute to national security efforts and collaborate with talented engineers in a dynamic, growth-focused workplace.

Responsibilities

• Administer and maintain Linux (Red Hat Enterprise Linux) and Windows systems in classified environments
• Manage VMware technologies and Network Attached Storage devices (NetApp ONTAP preferred)
• Ensure system performance, reliability, and compliance through proactive enhancements, patching, and configuration
• Coordinate with engineering and technical teams to support multi-user system operations
• Implement and monitor backup, recovery, file systems, disk space, and virus protection measures
• Oversee user and computer accounts, permissions, and security access lists
• Maintain audit logs and security documentation as directed by the ISSM
• Support Cyber Security initiatives and assist with security vulnerability remediation
• Report on project status and contribute to both recurring and ad-hoc system administration tasks

Required Skills and Experience

• Ability to obtain and maintain Top Secret (TS/SCI) clearance with Full Scope Polygraph
• Expertise in Linux (Red Hat Enterprise Linux) and Windows server administration
• VMware administration experience
• Proficiency with NAS storage device management (NetApp ONTAP preferred)
• DoD 8570 IAT Level 2 certification (e.g., Security+ CE) or eligible to obtain within 6 months
• Familiarity with classified environment system administration

Preferred Skills

• Advanced degree in a STEM field
• 5+ years Red Hat Enterprise Linux (RHEL) administration in SCI environments
• Experience with NISPOM, DCID 6/3-ICD 503, RMF, STIG, JAFAN, or JSIG frameworks
• Enterprise storage, RAID-levels, vulnerability management (Tenable/Nessus)
• Identity management, Active Directory, Windows 10/Server, GPOs
• VMware ESXi (6.x+), host-based firewall configuration, documentation (Wiki/SharePoint)
• Current certifications: Security+ CE, CASP, CISSP, or similar

Benefits

• Opportunities for career advancement and technical specialization
• Exposure to cutting-edge government and security projects
• Collaborative and supportive team environment
• Comprehensive benefits package (medical, dental, vision, retirement)

How to Apply

Ready to safeguard critical systems and grow your career in a high-security environment? Submit your application and resume today to join our Aurora-based team.

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Interested in this role?

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Job details

Job ID JPC - 206645

Location Aurora, Colorado, United States

Work Model On-site

Job Type W2

Posted July 21, 2026

Skills Must have a DOD Full Scope Polygraph Clearance

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