Backfill/OT Network Admin

Responsibilities: •             This position will require some field work inside the refinery process units. •             Perform network administration on switches, routers, and firewall network devices. Most configuration activities will be Layer 2 switching with some occasional Layer 3 routing work. •             Monitor network device health and identify issues using common industry toolsets. •             Problem tracking, management, and resolution of issues in a 24/7 manufacturing location. The candidate will be called upon to perform duties during off-hours on occasion as needed. •             Learn, understand and apply Marathon Standard Practices to OT infrastructure assets. •             Engage in auditing, compliance, and risk assessment processes. Ensure network device inventory is accurate. •             Administration of the physical IP cabling and IP address assignments to support the refinery OT communications. •             Review and Update network diagrams to accurately represent the physical connected IP network infrastructure. •             Identify, Analyze, and Elevate potential Cybersecurity events according to company procedures. •             Daily activities may also include network device backup administration, performance tuning, change control administration, network security detection administration, and self-auditing to ensure compliance with standards. •             Implement network solutions; ensuring standards are applied consistently. Close interaction with business partners during development, support, and implementation of in-house or 3rd party systems. •             Administration of network device logging to identify security or reliability issues. •             Create and present project documentation for capital and expense projects. •             Recommend continuous improvement opportunities. •             Participate on OT Subject Matter Expert teams for implementing cross-functional OT strategic initiatives. Providing subject matter expertise/consulting services. Preferred Qualifications: •             Bachelor’s degree in Computer Science, Information Systems, or related field. •             Previous experience in OT, Honeywell Experion, Emerson DeltaV, Foxboro, SCADA, or Refining environment is a plus. •             Experience with configuration of Cisco, Sonicwall, Tofino, or Checkpoint devices is a plus. •             Experience with Security Information Event Management (SIEM) a plus. •             Cisco switching, routing, or security certifications are a plus.