SIS Engineer

Location: LEMONT, IL

The SIS Engineer

The Safety Instrumented Systems (SIS) Engineer provides engineering services and expertise to ensure the safe and reliable management of SIS at the refinery throughout the entire IEC 61511 lifecycle. The SIS Engineer is part of the SIS team reporting to the refinery SIS Leader.

Key Responsibilities:

  • Assist the Maintenance department in maintaining and troubleshooting installed SIS, including updating documentation, test procedures, and providing support
  • Plan and oversee completion of all SIS testing according to defined intervals, including both online and offline testing during outages and turnarounds
  • Participate in investigations and review of SIS events to identify failures, demands, and spurious trips
  • Analyze the reliability of the SIS through a Key Performance Indicator (KPI) program and make recommendations for improvement
  • Contribute as a Subject Matter Expert for SIS and instrumentation during HAZOPs, analyzing Independent Protection Layers (IPLs) and HAZOP recommendations
  • Lead and participate in Functional Safety Assessments (FSAs) for new and existing SIS
  • Maintain and update SIS documentation, including Safety Requirements Specification (SRS), datasheets, drawings, and validation and proof tests
  • Participate in audits related to SIS, including Mechanical Integrity, PSM, and insurance risk
  • Engineer small expense-ruled SIS projects and author Engineering Work Requests (EWRs) for larger capital projects

Additional Responsibilities:

  • Apply instrumentation and SIS expertise in all job functions
  • Develop, review, approve, and update proof test procedures for installed SIS, evaluating test results and identifying corrective actions
  • Participate in Layers of Protection Analysis (LOPAs) for new and modified SIS
  • Provide technical support and best practices to capital project engineers for upcoming SIS projects
  • Aid turnaround planners in developing SIS scope and ensuring test procedure readiness
  • Select replacement instrumentation and valves when necessary, performing Management of Change (MOC) for SIS modifications
  • Review validation test procedures for new or modified SIS installations
  • Ensure SIS application programs meet requirements and are correctly tested


  1. Bachelor's degree in Electrical Engineering or Chemical Engineering
  2. 5 years of experience with industrial instrumentation
  3. 3 years of experience in the process industry (refining, preferred)
  4. 2 years of experience with Safety Instrumented Systems
  5. Active third-party SIS certification from exida (CFSE or CFSP) or TÜV (FS Engineer) preferred
  6. Must obtain certification within 12 months of being hired
  7. Experience with Distributed Control Systems
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