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Head of Upstream

Mark macdonald

Head of Upstream


Mark joined McLarens Natural Resources as Head of Upstream in January 2020.

Mark’s background is as a Measurement / Logging While Drilling (M/LWD) engineer working for a service company in the Oil and Gas Industry. During his time in the industry, he worked on many jack-up and semi-submersible rigs during drilling operations throughout the Dutch and UK sectors of the North Sea, as well as onshore Italy, the Netherlands, and the UK. He has experience of drilling conventional oil and gas wells, high pressure high temperature wells and geothermal wells.

In 2009, Mark began his loss adjusting career in London. Given his background and in-depth knowledge of drilling operations, he mainly focused on the handling of well control claims, both offshore and onshore and on a worldwide basis. He also gained knowledge of the London insurance market and of policy wordings associated with Control of Well and other Upstream Energy risks (Physical Damage, Offshore Construction, Loss of Production Income / Business Interruption).

In 2012, Mark moved to Singapore, primarily to deal with well control claims in the Asia-Pacific region. During his time in Singapore, Mark was involved in many complex well control claims, including underground blowouts. He also dealt with incidents involving deepwater drilling and managed pressure drilling. In addition to well control claims, Mark handled many Upstream Energy claims across Asia.

In February 2018, Mark returned to London to join another energy loss adjusting firm. In this role he continued to handle a variety of Upstream Energy claims.


  • Oil Company – COW: Shallow Gas Blowout, Offshore Indonesia (USD 120 Million)
  • Oil Company – COW: Underground Blowout, Offshore Indonesia (USD 70 Million)
  • Oil Company – COW: Deepwater Well Control Incident, Offshore Malaysia (USD 50 Million)
  • Oil Company – COW: Underground Blowout, Offshore Vietnam (USD 50 Million)
  • Oil Company – COW: Well Control Incident, Offshore Malaysia (USD 20 Million)
  • Oil Company – COW: Deepwater Well Control Incident, Offshore Egypt (USD 20 Million)
  • Oil Company – PD: Pipeline Damage, Offshore Thailand (USD 17 Million)
  • Oil Company – PD: Platform Damage, North Sea (USD 8 Million)
  • Oil Company – PD: Pipeline Damage, Offshore Australia (USD 7 Million)
  • Oil Company – CAR: Pipeline Leak, Offshore India (USD 7 Million)

Office Address / Contact Information

Forum House
15-18 Lime Street
United Kingdom
Local Time:
Local Date:

Industry Certification

Oil and Gas UK Medical Certificate for Offshore Work, Further Offshore Emergency Training (OPITO Approved), IWCF Level 2 Drilling Well Control


MEng (Hons) Electronic Engineering

Additional Expertise

Drilling Engineering, Measurement / Logging while Drilling, Directional Drilling, Offshore/Onshore Drilling Operations, Deepwater Drilling, Geothermal Drilling & Operations, Upstream Oil & Gas, Drilling Rigs, Production Platforms, FPSOs, Pipelines

Adjuster Experience

19 years 2005