Information Technology Systems Administrator - Specialist E3

Job Details

• Level: Experienced
• Job Location:
  
  Englewood, CO 80112
• Salary Range: $ - $ per year

The IT / Systems Administrator is responsible for the installation, maintenance, operation, and security of Radix Metasystems’ IT infrastructure, including networks, devices, software, web applications, and user accounts. This role provides TierI–III technical support and ensures appropriate access and permission controls across enterprise systems. The IT / Systems Administrator works collaboratively with technical teams, security personnel, and business stakeholders to maintain system performance, reliability, and compliance with organizational and regulatory standards.

This position operates in a fast‑paced and evolving technical environment and plays a critical role in maintaining operational continuity and cybersecurity posture.

• Administer and maintain daily IT operations and infrastructure
• Implement and support IT strategies, infrastructure improvements, and system modernization initiatives
• Provide TierI–III technical support for end users, including troubleshooting hardware, software, network, VOIP, and access‑related issues
• Install, configure, and maintain Windows enterprise domain software and applications
• Deploy software updates and manage software licensing to ensure compliance
• Manage, maintain, deploy, and track company hardware assets
• Sanitize, decommission, and properly dispose of end‑of‑life (EOL) IT equipment
• Create, modify, delete, and maintain user accounts and permissions across on‑premises, local, and SaaS environments
• Conduct IT on‑boarding and off‑boarding processes for employees
• Maintain and support network infrastructure including firewalls, VPNs, switches, wireless access points, and secure network access configurations
• Configure and maintain cloud computing services and remote access technologies
• Experience administering Red Hat Enterprise Linux (RHEL) workstation and server environments
• Experience managing RHEL using command‑line tools and shell scripting (Bash or equivalent)
• Experience managing user authentication and authentication including SSSD, LDAP, and/or Active Directory integration
• Experience performing system patching and package management using YUM/DNF and Red Hat repositories or Satellite
• Identify, assess, and mitigate system security risks
• Collaborate with ISSM/ISSO personnel to implement and maintain systems in accordance with RMF
  800‑53, NIST
  800‑171, and CMMC Moderate compliance standards
• Maintain documentation supporting change management and configuration management processes
• Perform system data backup, restoration, and disaster recovery support activities
• Support setup and deployment of new office or remote work environments as required
• Communicate effectively across departments to support operational needs
• Promote and reinforce Radix Metasystems’ culture and values
• Other duties as assigned

Radix Metasystems HQ, Englewood, CO

• U.S. Citizenship
• Currently active TS/SCI security clearance issued by a U.S. Government Entity
• Currently active Counterintelligence polygraph adjudicated by a U.S. Government Entity
• Must be able to provide 24/7 on‑call support on an as‑needed basis (this is rare)
• Bachelor’s degree in Information Technology, Computer Science, Information Systems, or related field. Equivalent professional experience may substitute for formal education
• 10‑14 years of experience providing enterprise‑level IT end‑user and systems administration support (including networking, systems, firewalls, and enterprise software)
• Security+ certification or equivalent cybersecurity certification
• Strong understanding of computer systems, operating systems, networking, security principles, and file systems
• Thorough knowledge of IT operational procedures and best practices
• Experience configuring and managing Linux services such as SSH, NFS, SMB, DNS, and web services
• Experience implementing and managing SELinux policies and troubleshooting SELinux‑related issues
• Experience with Red Hat Satellite or similar configuration management tools
• Experience with Ansible, Puppet, or other infrastructure automation platforms
• Virtual Desktop Infrastructure (VDI)…