Principal Consultant – John Kernaghan CEng, FRINA, MSNAME

John Kernaghan is a highly experienced engineer having worked in the marine industries for over forty years. His career has covered all stages of engineering, from conceptual and detailed design through to fabrication and field operations. Initially employed in Shipyards, the Fishing and Defence industries he has, since 1981, been involved with offshore oil and gas developments throughout the world. This has included semi-submersible drilling and production units and steel and concrete sub-structures. Principal companies worked for include Centrica (FLNG and CNG), Noble Denton, KBR (design and operation of FLNG, FPSO’s, and TLP’s), Petrofac and Earl and Wright (design of SEDCO MODU’s).

He has a strong technical background and has acted on numerous occasions as a project manager at Centrica, KBR and Noble Denton, responsible for relevant technical, commercial and financial activities. This has included project and financial controls and interfacing with and supervision of sub-contractors. 

Most recently he has been retained as an independent expert witness in Arbitration cases. This has included preparation of reports, attendance at Arbitration Tribunal giving both written and oral evidence and cross examination. 


  • Expert Witness and Arbitration
  • Project Engineering
  • Naval Architecture
  • Shipbuilding
  • Design, procurement, fabrication, commissioning and operation of various vessel types

Specialist Vessel Experience 

  • Semi Submersibles – Production and MODU
  • Floating Production Storage and Offloading Vessels – FPSO
  • Floating Liquefied Natural Gas Production Vessels – FLNG
  • Re-gas facilities – FSRU
  • Gravity structure, steel and concrete

Clients have included

  • Centrica
  • LOC
  • Braemar
  • Addax
  • Eni
  • JP Kenny
  • Petrofac
  • KBR/Brown & Root/Halliburton/Granherne
  • ODE
  • Ove Arup
  • Bechtel
  • Noble Denton
  • Crondall Energy