Mark has advised:

  • a South American company in an ICC commercial arbitration relating to design defects
  • a Nigerian oil & gas E&P company on claims against a Chinese state-owned entity subject to LCIA arbitration in connection with a defective oil tanker
  • an international bank in a multi-million-dollar dispute with two syndicates of insurers in connection with a multi-billion-dollar debt scandal in Africa, subject to LCIA arbitration
  • a consortium of Spanish contractors in two separate ICC arbitration proceedings relating to two of the world’s largest solar farm projects based in northern and southern Africa
  • the employer on several ICC arbitrations in connection with the design and construction of a major maritime project in Central America
  • the contractor for a major road development in Saudi Arabia in relation to various disputes with the developer
  • a joint venture contractor in its claims for delay and disruption in relation to its work on a major Middle Eastern airport on an Abu-Dhabi-seated arbitration
  • a leading Saudi contractor in an ICC arbitration in connection with the construction of a textile plant
  • a leading arbitration institution on claims for breach of contract
  • a Kuwaiti-based contractor in a multi-million-dollar ICC arbitration in connection with a major infrastructure project in Qatar
  • Kuwaiti investors on an ICSID arbitration against the Government of Jordan


Mark is an arbitration specialist, advising in international commercial and investor-state arbitrations. His practice is almost exclusively international and spans industries including construction, engineering and energy.

Mark has acted in disputes in multiple jurisdictions and has extensive experience in complex cross-border matters working on cases under all the major arbitration rules including ICC, LCIA, ICSID and UNCITRAL.

Mark is active in the international arbitration community, with a growing reputation amongst young practitioners. He is a committee member of the CiArb Young Member’s Group London Branch and is the Delos Guide to Arbitration Places (GAP) reviewer for Ireland. Mark is also a committee member of the Arbitration Ireland Young Practitioners Group and currently acts as an international mentor for the Istanbul Arbitration Centre.


Mark is recognised in the legal directories:

  • Legal 500: ranked as a “Rising Star” in International Arbitration and described as “a no-nonsense lawyer; who has fantastic analytical and drafting skills. He works hard and brings with him a deep analytical understanding of commercial and construction arbitration issues”.
  • Chambers & Partners: “Mark is a fantastic lawyer. He is strategic and commercially aware with a real world savviness that goes a long way in the management of cases. He works tirelessly on behalf of clients”.


Mark studied law at University College Cork and University College London. He joined Stewarts in 2021. Prior to this, Mark trained and worked in the International Arbitration team of Mayer Brown, during which time he was seconded to the New York, Hong Kong and Dubai offices.

Accreditations and Memberships

Mark is a member of various arbitration and industry associations including:

  • Young ICCA
  • CiArb Young Members Group
  • Arbitration Ireland
  • Young ISTAC
  • LCIA Young International Arbitration Group

Publications and Media

Mark regularly publishes articles and delivers specialist training. He has also been a speaker at arbitration events.

Recent speaking engagements and articles include:


Mark was born and raised in Ireland. He enjoys cooking, reading, and travelling and is an avid theatre-goer.