JPC - 206645 - Sr Principal Systems Administrator

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.