OT Infrastructure Specialist: Systems & Security

Petro Papa; Dallas (TX); On-site; USD 90,000 - 140,000; Full time

Benefits offered by this job

Medical Insurance

Vision Insurance

Paid Time-Off

401(k) Retirement Plan with match

Educational Reimbursement

Parental Bonding Time

Employee Discounts

Job summary

HF Sinclair is seeking an OT System & Infrastructure Specialist to support fleet-wide OT infrastructure, including servers, networks, and industrial control systems. The role involves technical administration, troubleshooting, lifecycle support, patching, backup and recovery, and project work across multiple sites.

The candidate will coordinate with OT Cyber, IT, and site teams, ensuring secure, reliable OT operations. A bachelor’s degree and 4–7 years in relevant fields are preferred.

Qualifications

• Minimum 4–7 years in OT infrastructure, ICS, or related fields.
• Experience with industrial control system environments (Honeywell/Siemens/Foxboro or similar).
• Knowledge of Windows Server, virtualization, AD, backups, networks, and firewalls.
• Experience in refinery/industrial settings preferred.
• Solid understanding of OT cybersecurity concepts and patch management.
• Familiarity with ISA/IEC 62443 principles and IACS security concepts.

Responsibilities

• Administer, maintain, and support OT infrastructure across fleet locations.
• Provide hands-on support for OT platforms and IACS environments.
• Assist with system hardening, baselines, patching, and DR procedures.
• Deploy and manage centrally managed OT infrastructure tools and apps.
• Coordinate with operations, IT, vendors, and site leadership.
• Maintain OT asset records, network diagrams, and documentation.

Skills

OT infrastructure

Industrial networking

Windows Server

OT cybersecurity

Vendor coordination

Education

Bachelor’s degree in computer science/engineering or related

Tools

ISA/IEC 62443

Honeywell Experion PKS/FTE

Foxboro ICS

Siemens ICS

VMware

Fortinet/Cisco firewall

Job description

HF Sinclair is seeking an OT System & Infrastructure Specialist to support fleet-wide OT infrastructure, including servers, networks, and industrial control systems. The role involves technical administration, troubleshooting, lifecycle support, patching, backup and recovery, and project work across multiple sites.

The candidate will coordinate with OT Cyber, IT, and site teams, ensuring secure, reliable OT operations. A bachelor’s degree and 4–7 years in relevant fields are preferred.