Security-Cleared IT Systems Administrator

Millennium Space Systems, Inc.; El Segundo (CA); On-site; USD 103,000 - 174,000; Full time

Job summary

Millennium Space Systems in El Segundo, CA is seeking a highly motivated IT Systems Administrator to maintain, configure, update, and secure our enterprise and air-gapped systems. You will work across Windows Server, Linux, VMware, and networking, aligning with DoD security standards and internal policies.

This role sits onsite at our El Segundo office and participates in ongoing infrastructure modernization.

Qualifications

• Ability to obtain security certifications such as Security+ or equivalent IAT Level 2 certifications per DoD Instruction 8570 (8140).
• Experience installing, configuring, troubleshooting, and administering Windows Server (2016 or later) and Windows desktop OS (Windows 10 or later).
• Experience with VMware vCenter, vSphere, and managing virtual machines.
• Experience administering Red Hat Linux based systems with minimal support, to include Linux sub-systems, patching, packaging (RPM), performance tuning, networking, user management, and security.
• This position requires the ability to obtain a US Security Clearance for which the US Government requires US Citizenship. A final U.S. clearance Post Start is required

Responsibilities

• Provide Tier II and below support
• Manage system installation, configuration, upgrades, and updates on secure networks
• Maintain documentation for system operations, changes, and procedures
• Provide technical support and interact with customers in-person, by email, or by response to tickets
• Escalate tickets, tasks, and problems as required
• Monitor systems and resolve issues to prevent costly downtime
• Other job duties as assigned

Skills

Security+ / IAT Level 2

Windows Server administration

VMware vCenter / vSphere

Red Hat Linux administration

US Citizenship + security clearance

Tools

Active Directory

VEEAM Backup Suite

Power Protect Data Manager

Cisco/Palo Alto/Juniper devices

DoD STIGs

Job description

Millennium Space Systems in El Segundo, CA is seeking a highly motivated IT Systems Administrator to maintain, configure, update, and secure our enterprise and air-gapped systems. You will work across Windows Server, Linux, VMware, and networking, aligning with DoD security standards and internal policies.

This role sits onsite at our El Segundo office and participates in ongoing infrastructure modernization.