Sr CI/OT Specialist

Sr CI/OT Specialist

Location: Dallas, TX, US 75024
Company Overview

Delek US Holdings is a boutique‑sized diversified downstream energy company with refinery and logistics assets in Texas, Arkansas, and Louisiana. Our refineries have a combined crude capacity of 302,000 barrels per day. Our logistics business operates 720 miles of crude and product pipelines, a 600‑mile crude oil gathering system, and multiple storage tanks and terminals.
Benefits

Up to 10% match on 401(k) with one‑year vesting
Medical benefits start the day after hire with a 30% premium rebate annually
Access to the Calm app for stress management (free)
Performance‑based incentives and competitive bonus payouts
Job Summary

The Sr. CI/OT Specialist develops relationships with business units to identify, develop, and support IT/OT services. The role designs, implements, maintains, and secures OT network and platform infrastructure in industrial control environments and serves as the main point of contact for service issues.
DKL Integration Responsibilities

Design, implement, maintain, and secure OT network and platform infrastructure at DKL sites.
Ensure reliability, stability, and security of OT systems, support integration with IT networks, and manage 3rd‑party vendors.
Maintain compliance with NIST, IEC 62443, ISA‑99, and other industry regulations.
Configure, install, maintain, and upgrade computer systems hardware and software; coordinate escalations with vendors.
Collaborate with technology resources, leadership, and customers to develop solutions that support safe, compliant operations.
Education and Experience

Bachelor’s degree in Computer Science, Information Technology, Engineering, or related field (required).
Or equivalent combination of education and experience.
Six (6) or more years of related experience (required).
Three (3) years of OT network engineering or management (required).
Strong knowledge of industrial networking standards (Ethernet/IP, Modbus, MQTT), routing protocols (OSPF, EIGRP), VLAN configuration, and Purdue model segmentation.
Experience with cybersecurity frameworks and compliance (NIST, IEC 62443, NERC CIP).
Proficiency in VMware ESXi, Microsoft Hyper‑V, network monitoring tools, and disaster recovery planning.
Preferred: experience with SCADA systems, virtual servers, backup environments, OT wireless networks, virtual server infrastructure, process historians, report generation, capacity planning, team management, project management, and operational incidents.
Job Requirements

Relationship management, communication, IT architecture, solution delivery methodology, issue management, project management, business acumen, reporting.
Physical capability: lift up to 50lb, squat and stand repeatedly, move equipment, work in small office spaces.
End‑user support for corporate hardware and software.
Own ticket lifecycle from creation to resolution.
Escalate tickets to appropriate groups.
Compile and present operational reports and identify trends.
IT and OT system hardware management, ensuring availability, backup, and disaster recovery.
Administer IT/OT systems; key resource for projects and initiatives.
Develop and maintain OT network topologies, manage routers, switches, wireless access points, LANs, WANs, and F5 BigIP systems.
Manage 3rd‑party carriers and network service providers.
State OT network troubleshooting, ensuring stability and reliability (cellular, satellite, radio, terrestrial).
Install and maintain OT cabinets, UPS systems, cabling, fiber, environmental monitoring.
Provide 24/7/365 support for OT networks and systems.
Perform OS patching, upgrades, and backups.
Manage Active Directory architecture and user access.
Collaborate with IT, SCADA, operations, and engineering teams.
Maintain documentation of OT network setups, processes, and security protocols.
Oversee IT/OT system development, vendor support, and project planning for upgrades and capital projects.
Lead operational incidents and maintenance activities.
Implement and maintain cybersecurity controls, incident response protocols, and ensure compliance with NIST, IEC 62443, ISA‑99.
Provide strategic input into OT network architecture roadmaps and long‑term planning.
Support across multiple sites with periodic travel to remote locations.
Core Competencies

Change Agility (Level2)
Collaboration (Level2)
Decision Making (Level2)
Drive for Results (Level2)
Team Building (Level2)
Equal Employment Opportunity

Delek is an equal‑opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability status, protected veteran status, or any other characteristic protected by law.

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