Control Systems Applications Administrator – OT/IT Hybrid in Dallas

Amtex Enterprises Inc.; Dallas (TX); Hybrid; USD 90,000 - 130,000; Full time

Job summary

Amtex Enterprises Inc. is seeking an experienced Application System Administrator (Control Systems) for a 12+ month contract in Dallas, TX, hybrid work with 3 days in office and occasional travel. Requires 8+ years of expertise in OT/control systems, Windows and Linux administration, scripting, and strong coordination with vendors.

The role supports real-time operations and on-call rotation as needed. The candidate will maintain and upgrade control system applications, develop test strategies,

Qualifications

• Experience maintaining Control System/OT applications.
• Strong knowledge of Windows and Linux server tasks.
• Ability to document changes and communicate risk.
• Experience with outages and change coordination.
• Understanding of compliance standards (CIP, NERC CIP).
• Ability to work with vendors and cross-functional teams.
• Capability to support 24/7 real-time operations.

Responsibilities

• Maintain and upgrade Control System applications.
• Develop and test code updates before production.
• Review change risks and communicate to stakeholders.
• Coordinate outages for maintenance and upgrades.
• Support on-call rotation and incident response.
• Collaborate with OT vendors and internal teams.
• Ensure 24/7 operation of Control Systems.

Skills

Control System admin

Windows Server

Linux (RHEL)

Scripting (Python, PowerShell, Bash)

JSON/XML data structures

Vendors coordination

On-call rotation experience

OT/ICS familiarity

Security & compliance (CIP, NERC CIP)

Tools

Nutanix

Hyper-V

VMware

Active Directory

Git

Job description

Amtex Enterprises Inc. is seeking an experienced Application System Administrator (Control Systems) for a 12+ month contract in Dallas, TX, hybrid work with 3 days in office and occasional travel. Requires 8+ years of expertise in OT/control systems, Windows and Linux administration, scripting, and strong coordination with vendors.

The role supports real-time operations and on-call rotation as needed. The candidate will maintain and upgrade control system applications, develop test strategies,