John Marrin QC > Chambers of Marcus Taverner QC > London, England > Lawyer Profile

Chambers of Marcus Taverner QC
Keating Chambers
John Marrin photo


John Marrin QC  specialises in construction, engineering and energy-related disputes.  His experience also extends to various other technical fields such as computer software, rail and supply disputes in the oil and gas sector.

John Marrin has practised from Keating Chambers for over 35 years.  He served as Head of Chambers from 2005 to 2010. Until 2017, he represented a wide variety of clients in the High Court, the Court of Appeal, the House of Lords and the Supreme Court in England and before various other domestic and international tribunals.

He is a former Recorder of the Crown Court and a former Deputy High Court Judge, sitting both in the Queen’s Bench Division and in the Technology and Construction Court.  He is a Chartered Arbitrator and a Fellow of the Chartered Institute of Arbitrators and he is named on various arbitration panels internationally.  John Marrin has long experience of acting as an adjudicator and as a mediator. He is a TECBAR Accredited Adjudicator and a CEDR Accredited Mediator.

John Marrin now practises primarily as an Arbitrator.


Called to the Bar – Inner Temple 1974, Queen’s Counsel 1990, Assistant Recorder of the Crown Court 1993, CEDR Accredited Mediator 1993, Recorder of the Crown Court 1997-2014, Deputy Judge of the Technology and Construction Court 1997-2014, Fellow – Chartered Institute of Arbitrators 1998, Bencher of the Inner Temple 2002, Deputy High Court Judge 2008-2014


MA in Law – Magdalene College, Cambridge 1973

Lawyer Rankings

Asia Pacific - The English Bar > Construction, energy and infrastructure

(Leading Silks) Ranked: Tier 2

John Marrin QCKeating ChambersOne of the leading arbitrators – the ideal choice for chairing a complex, heavy dispute.

London Bar > International arbitration: arbitrators

(Leading arbitrators) Ranked: Tier 1

John Marrin QCKeating ChambersExceptionally experienced international arbitrator who is diligent, thorough and careful – a pragmatic chair/president who is the ideal choice for a factually or technically complicated construction, energy or infrastructure disputes.

Keating Chambers is ‘an excellent set of well-managed chambers‘ with ‘a collection of impressive individuals‘. The set has ‘a number of leading arbitrators specialising in international engineering and construction disputes‘. The set has a strong flow of full and part-time arbitrators, with extremely good track records for arbitrating disputes in Asia, the Middle East and Africa. Full-time practitioners such as Robert Gaitskell QC, John Marrin QC, John Uff CBE QC, Stephen Furst QC and Timothy Elliott QC have established themselves as leading figures in the market, while Richard Harding QC and Marcus Taverner QC enjoy strong reputations as both counsel and arbitrator.

London Bar > Construction

(Leading Silks) Ranked: Tier 4

John Marrin QCKeating ChambersHeavyweight advocate with decades of experience.