Senior System Administrator

Description

• Mentor junior team members and contribute to the development of infrastructure best practices across the organization
• Design, deploy, and maintain Radiant’s server, storage, and network infrastructure (including hybrid cloud and on-prem environments)
• Collaborate with mechanical and production teams to install and configure PLCs, DAQs and set up operator stations
• Troubleshoot and resolve infrastructure incidents, performing root cause analysis and corrective action
• Ensure high availability, performance, and disaster recovery for critical systems and services
• Implement and maintain system security, including patching, access control, hardening, and vulnerability management

Requirements

• Must be willing to work extended hours and weekends as necessary to accomplish our mission.
• Bachelor’s degree in computer science or engineering
• Proficiency in scripting or programming languages (e.g., Bash, Python, PowerShell, Power Automate) for automation
• Experience with infrastructure as code tools (e.g., Terraform, Ansible, or similar)
• Familiarity with real-time systems, embedded environments, or hardware/software integration
• Highly self-motivated with strong communication skills
• Experience testing software and hardware systems
• Prior work in regulated or high-assurance environments (e.g., nuclear, aerospace, defense, healthcare)
• Prior experience withmanaging Kubernetes
• Experience with PLCs (like Beckhoff or Rockwell Automation)
• Ability to work from Radiant’s office in El Segundo, CA (greater Los Angeles) full-time
• 5+ years of professional experience as a system administrator or infrastructure engineer
• Must work 100% onsite at El Segundo HQ.
• Strong Windows and Linux system administration skills in production environments
• In-depth understanding of networking concepts (TCP/IP, routing, DNS, firewalls) and storage systems
• Prior experience with administering Microsoft 365 or Google Workspace

Benefits

• 8-weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees.
• One Medical: Sponsored memberships for eligible employees and their dependents.
• Stock: Substantial incentive stock plan for all full-time employees.
• Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA are offered as employee contributed benefits.
• Daily catered lunch. Free snacks and drinks.
• Beautiful El Segundo headquarters close to the Pacific Ocean.
• Medical: 100% premium coverage for base Silver level plan for employee + 50% premium coverage for dependents. Platinum plans available.
• Dental: 100% premium coverage for top tier plan (including orthodontia) + 50% for dependents.
• Vision: 100% premium coverage for top tier plan + 50% for dependents.
• Company and team-bonding events, happy hours and in-person camaraderie.
• Flexible PTO policy. Remote workday allocation.

Training + Development

Interview process

Visa Sponsorship

Security clearance