Senior Systems Admin — Defense IT, Cloud & Security

Linuxconfig; Vista (CA); On-site; USD 97,000 - 154,000; Full time

Job summary

Inversion seeks an experienced System Administrator to support mission-critical IT infrastructure in a defense contracting setting. You will manage cloud services, maintain Windows and Linux environments, and work with container platforms like Docker and Kubernetes to ensure secure, compliant operations.

Must have a strong security mindset, ITAR/NIST/DFARS awareness, and the ability to obtain a U.S. government security clearance. Office presence in Playa Vista, CA is required.

Qualifications

• 5+ years of experience in comparable environments.
• Experience supporting systems in defense or other highly secure environments.
• Expertise in virtualization technologies and cloud platforms.
• Strong knowledge of networking protocols, routing, switching, and secure network design.
• Understanding of cybersecurity principles, secure configuration, and defense contract compliance.
• Proficiency in Windows and Linux administration.
• Strong analytical, troubleshooting, and documentation skills.
• Ability to operate within structured processes and controlled change environments.
• Must be able to obtain and maintain a U.S. government Secret/Top Secret clearance.

Responsibilities

• Manage cloud services (AWS/Azure/GCP) with provisioning, monitoring and cost control.
• Maintain Windows and Linux (RHEL preferred) environments.
• Work with Docker and Kubernetes in containerized environments.
• Configure and secure network devices, firewalls, VPNs, and segmented networks.
• Patching, hardening, and continuous monitoring for security/compliance.
• Implement ITAR/NIST/DFARS aligned technical controls.
• Assist with identity and privileged access management workflows.
• Troubleshoot system, network and application issues to ensure operations.
• Support disaster recovery planning and backup strategies.
• Collaborate with security, compliance and engineering teams to meet program requirements.

Skills

Cloud management

Windows admin

Linux admin

Docker

Kubernetes

ITAR/NIST/DFARS

Networking security

Documentation

Patching and hardening

Troubleshooting

Tools

VMware

Hyper-V

Terraform

Ansible

PowerShell

Bash

Job description

Inversion seeks an experienced System Administrator to support mission-critical IT infrastructure in a defense contracting setting. You will manage cloud services, maintain Windows and Linux environments, and work with container platforms like Docker and Kubernetes to ensure secure, compliant operations.

Must have a strong security mindset, ITAR/NIST/DFARS awareness, and the ability to obtain a U.S. government security clearance. Office presence in Playa Vista, CA is required.