System Administrator - Senior Specialist E4

RADIX METASYSTEMS INCORPORATED•Englewood, CO

About The Position

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 Tier I–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.

Requirements

U.S. Citizenship
Currently active TS/SCI security clearance issued by a U.S. Government Entity
Must be able to provide 24/7 on-call support on an as-needed basis
Bachelor’s degree in Information Technology, Computer Science, Information Systems, or related field. Equivalent professional experience may substitute for formal education
15 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 troubleshooting complex IT infrastructure and user support issues
Solid understanding of coding languages, scripting, and security protocols relevant to enterprise environments
Ability to manage multiple tasks, priorities, and projects simultaneously
Strong analytical, troubleshooting, and problem-solving skills
Strong interpersonal and communication skills with the ability to work effectively across technical and non-technical teams
Demonstrated leadership, decision-making, and organizational skills
Ability to operate effectively in a fast-paced and continuously evolving technical environment
Ability to maintain confidentiality and demonstrate exceptional trustworthiness when handling sensitive information
Proficiency or demonstrated ability to quickly learn enterprise hardware, software, and specialized applications used within the organization
Strong team-oriented mindset and customer-service focused approach

Nice To Haves

Existing privileged user or administrative access experience
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) solution experience
Microsoft Remote Desktop Services (RDS) or VMware virtualization experience
CISSP or other advanced cybersecurity certifications
Red Hat Certified System Administrator (RHCSA)
Red Hat Certified Engineer (RHCE)
Linux+

Responsibilities

Administer and maintain daily IT operations and infrastructure
Implement and support IT strategies, infrastructure improvements, and system modernization initiatives
Provide Tier I–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 authorization 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