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Mark T. O'Neil

Mark T. O'Neil



  • University of Southampton, LL.B.
  • College of Law, Guildford, LSF, First Class Honours
  • Royal Military Academy Sandhurst (RMAS), RA Medal of Honour

Professional Admissions / Qualifications

  • England and Wales


  • German
  • French

Mark is a partner in the Shipping Group and co-leads the offshore team.

On the shipping side, he works for owners and charterers, P&I clubs, management companies, brokers and ship finance banks. Mark has extensive experience in complex charterparty, bills of lading/cargo and MOA disputes, be they by way of commercial court, arbitration (London or International) or mediation.

He has established particular experience in the area of off-shore/oil/gas (primarily FPSO Production and Services Contracts, Drilling Contracts, Supply Contracts negotiation and complex dispute litigation relating to same.)

In this regard, the complex litigation team has recently successfully represented a client in a major drilling contract delivery dispute concerning claims of repudiatory breach and misrepresentation and in the biggest FPSO dispute to date concerning responsibility for an FPSO loss of station keeping during a storm in the North Sea.

He advises on financial restructurings for ship finance banks, advising on a very wide range of both contentious and non-contentious issues.

Mark focuses on the German, Scandinavian, Cypriot, Greek and South American markets.

Lectures and Publications

Mark lectures at and chairs numerous industry shipping and offshore seminars/conferences and hosts annual Reed Smith Shipping conferences in Germany, Cyprus, Chile and Denmark.

Employment History

  • 2007 - Reed Smith
  • 2006 - Richards Butler (combined with Reed Smith in 2007)
  • 2002 - Stephenson Harwood (incorporating Sinclair Roche & Temperley)
  • 1996 - Sinclair Roche & Temperley
  • 1993 - Constant & Constant
  • RMA Sandhurst
    • Officer in British army 5 years – rank of Captain