Senior Control Systems Administrator (L3) – 24/7 Ops

Peyton Resource Group; Dallas (TX); On-site; USD 110,000 - 140,000; Full time

Job summary

Peyton Resource Group is seeking an experienced System Administrator (Control Systems) to support real-time OT environments in Dallas, TX. The role requires deep expertise in Windows and Linux server administration, virtualization management, and security/compliance for critical infrastructure.

The ideal candidate will have 8+ years of experience, strong troubleshooting ability, and the skill to coordinate with cross-functional teams to maintain 24/7 availability of control system environments.

Qualifications

• At least 8 years of experience in the listed technology areas and subject matter expertise in control system environments.
• Experience with Windows OS (2012–2022–2025), Linux (RHEL 7.x–9.x), VMware, and Nutanix technologies is required.
• Knowledge of OT/support operations in control system environments is preferred.
• Ability to understand and resolve issues quickly, mitigate risks, and analyze dependencies.

Responsibilities

• Provide tier-3 engineering support for control system infrastructure.
• Maintain and administer Windows and Linux servers, and manage virtualization and provisioning tasks.
• Maintain Nutanix and VMware VDI environments and ensure high availability.
• Apply security patches and updates using SCCM and Red Hat Satellite.
• Collaborate with multiple teams and participate in on-call rotation.

Skills

Windows Server

Linux

VMware

Nutanix

Active Directory

PowerShell

VDI

Security Compliance

Tools

Nutanix Prism Central

VMware vSphere

vRealize Suite

Horizon View

Microsoft SCCM

Red Hat Satellite

Job description

Peyton Resource Group is seeking an experienced System Administrator (Control Systems) to support real-time OT environments in Dallas, TX. The role requires deep expertise in Windows and Linux server administration, virtualization management, and security/compliance for critical infrastructure.

The ideal candidate will have 8+ years of experience, strong troubleshooting ability, and the skill to coordinate with cross-functional teams to maintain 24/7 availability of control system environments.