Control Systems Administrator – 24/7 Operations Expert

Colaberry; Dallas (TX); On-site; USD 90,000 - 120,000; Full time

Job summary

Oncor seeks an experienced System Administrator (Control Systems) to ensure real-time operation of control system environments. The role demands expertise in Windows Server and Linux, virtualization, and Nutanix/VMware platforms, with a focus on security, compliance, and resilience.

The ideal candidate will handle on-call rotation, coordinate with OT and IT teams, and maintain high availability for critical infrastructure in a fast-paced utility setting.

Qualifications

• 8+ years of experience in technology areas relevant to control systems and IT operations.
• Expertise with Windows Server, Linux, virtualization, and data center hardware.
• Knowledge of NERC CIP regulatory requirements and best practices.
• Ability to quickly diagnose issues, mitigate risks and analyze dependencies.

Responsibilities

• Manage and administer Windows (2012–2025) and Linux (RHEL) servers.
• Support virtualization, provisioning, maintenance, and security compliance.
• Maintain Nutanix/VMware VDI environments and server lifecycle.
• Apply security patches and updates using SCCM and Satellite servers.
• Provide tier-3 engineering support and participate in on-call rotation.
• Collaborate with cross-functional teams supporting control system tools.

Skills

Windows Server administration

Linux (RHEL)

VMware

Nutanix Prism

PowerShell scripting

Active Directory

DNS/DHCP

Security compliance (NERC CIP)

SCCM/Redhat Satellite

On-call rotation

Tools

Nutanix Prism Central

VMware vSphere

Horizon View

Microsoft SCCM

Red Hat Satellite

Active Directory management

Job description

Oncor seeks an experienced System Administrator (Control Systems) to ensure real-time operation of control system environments. The role demands expertise in Windows Server and Linux, virtualization, and Nutanix/VMware platforms, with a focus on security, compliance, and resilience.

The ideal candidate will handle on-call rotation, coordinate with OT and IT teams, and maintain high availability for critical infrastructure in a fast-paced utility setting.