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Markel International bolsters leadership in new Marine Transportation business with two key appointments

  • Markel Insurance appointed Dean Johnson as Head of Transport & Logistics & Rhys O'Neill as Head of Marine Liability.
  • These appointments support Markel International's new Marine Transportation business, which unites Hull & Hull War, MECO, Marine & Energy Liabilities, & Transport & Logistics.
  • Johnson will lead sustainable portfolio expansion, risk assessment, pricing, & underwriting standards for the Transport & Logistics segment.
  • O'Neill will drive profitable growth in the Marine & Energy Liability portfolio, manage complex risks, & ensure bespoke client solutions.
  • Both executives are based in London & report directly to Grant Smith, Director of Marine Transportation.
  • Smith cited rising geopolitical tensions, weather patterns, & technological developments as key drivers for the need for specialist underwriting.
  • Johnson previously served as Senior Underwriter for Transport & Logistics since 2025 & spent 14 years at Travelers.
  • O'Neill holds over 15 years of liability underwriting experience at Lloyd's Syndicates & P&I Clubs & joined Markel two years ago.