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Rob Magraw
Nathan Knochel

published on

April 2024


1 / 3 Series


This webinar presents high-level introductory material regarding Process Hazard Analysis (PHA) and Layers of Protection Analysis (LOPA). The target audience would be operating companies and EPCs wanting to gain general knowledge of PHA and LOPA, their applicability to existing processes and capital projects, basic team and data requirements for each, and how to select an effective facilitator for each.

Covered in this webinar:

  • Basic principles of PHA and LOPA preparation.
  • Data requirements for PHA and LOPA.
  • Who should be on a PHA or LOPA team?
  • How to select the right PHA or LOPA facilitator?


Our Presenters Experience:

Nathan Knochel:

  • Over 15-years of industry and consulting experience in the U.S. with a focus on:
    • Providing process engineering and process safety support for continuous and batch manufacturing facilities in the petrochemical, specialty chemical, and agricultural sectors.
  •  Supporting facilities in meeting internal and external process safety requirements.
    • This included performing cyclical PHA’s, project PHA’s, Layer of Protection Analysis (LOPA), Independent Protection Layer (IPL) Safeguard Validation, Management of Change (MOC) reviews, Pre-Start-up Safety Reviews, Self-Assessments, and determining U.S. OSHA PSM/EPA RMP regulation applicability.
  • Participating in incident investigations using root cause methodology.
  •  Serving as process safety leader for engineering, construction, and commissioning of multiple capital projects in excess of $150MM.


Rob Magraw:

  •  Since joining BakerRisk in 2008, Mr. Magraw has undertaken a broad range of process safety related work including:
    • leading PHA studies, insurance risk engineering surveys, SIS/SIL studies, management system development, independent reviews and audits, quantified risk assessments and accident investigations at numerous onshore and offshore oil, gas and petrochemical facilities across the globe.
    • He has developed and delivered various training and workshops on process safety related topics.
    • Mr. Magraw was appointed Operations Manager for BakerRisk Europe Limited in June 2009.
  • He has conducted PHAs, including HAZID, HAZOP, What If and LOPA for offshore facilities and refinery and petrochemical facilities at locations including U.K., U.S.A., Qatar, Saudi Arabia and China.
  • He has led insurance risk surveys of offshore facilities and midstream and downstream onshore facilities at various global locations, including the U.K., U.S. and Middle East.
  • Mr. Magraw has extensive safety management experience, having previously managed and performed safety and environmental impact analyses and prepared safety cases for a broad range of nuclear facilities to support safe and environmentally responsible operations and regulatory licence applications. He utilised various consequence modeling, frequency assessment, quantified risk assessment, and ALARP risk justification tools and techniques. He also provided expert advice on radioactive waste vitrification process safety to U.S. DoE.
  • He has operated both as a consultant and as part of multi-discipline project teams, and has managed teams providing a wide range of specialist safety services.

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Rob Magraw

Nathan Knochel