Professor Merkin is Lloyd's Professor of Commercial Law at the University of Exeter, and Special Counsel to DLA Piper.

He has published extensively and is a consultant to the English and Scottish Law Commissions for their project on insurance contract law reform. He co-authored with Ian Enright and Michael Kirby the fourth edition of Sutton’s Law of Insurance in Australia, published at the end of 2014. He has written numerous books on insurance and reinsurance law in England, Australia, Hong Kong and New Zealand.

Professor Merkin is Vice-President of the International Association of Insurance Law (AIDA) and Secretary of the AIDA Reinsurance Working Party. He co-edits Lloyd's Law Reports and sits on the arbitral panels of the Singapore International Arbitration Centre and the Hong Kong International Arbitration Centre.