Michael Twomey

Michael Twomey | Litigation & Dispute Resolution Lawyer | Arthur Cox


Michael is a Partner in the Arthur Cox Litigation and Dispute Resolution group. He specialises in commercial and corporate disputes, including, in particular, financial services litigation, shareholder and contractual disputes, disputes arising from commercial property transactions, landlord and tenant issues, and professional negligence.

Michael advises a wide variety of clients, including Irish and international companies, professional services firms, financial institutions, and statutory/government bodies, in dispute prevention, formal litigation and alternative dispute resolution procedures such as arbitration and mediation. Michael tutors at the Law Society of Ireland’s Diploma in Commercial Litigation course.

Michael qualified as a solicitor in 2010, having trained with the firm. He is a graduate of University College Cork.


  • Acting for a major multi-national bank in the defence of a c. €400 million claim by the liquidators of a Cayman-registered and domiciled hedge fund to which it provided fund administration and accounting services.
  • Acting for the Musgrave Group, owner of the “SuperValu” supermarket brand, in the successful defence of an injunction application by a shopping centre landlord seeking to enforce a “keep open” covenant in a lease. This was the first such successful defence in the Irish courts.
  • Advising the National Oil Reserves Agency, an Irish statutory body, in relation to the successful resolution of an illegal trespass on a key strategic oil site in Dublin and an underlying contractual dispute.
  • Acting for Canada Life in relation to a significant tax dispute with the Irish Revenue Commissioners arising from Canada Life’s €1.3 billion purchase of Irish Life from the Minister for Finance in 2013.
  • Advising a top-four worldwide accounting and auditing firm in relation to their joinder as a third party to Irish Commercial Court proceedings alleging negligence in the performance of audits.
  • Advising the Personal Injuries Assessment Board in relation to a complex High Court judicial review action in respect of its practices and procedures.
  • Acting for Kennedy Wilson in relation to a number of landlord and tenant disputes at commercial and residential properties.
  • Representing the Dublin Docklands Development Authority in the successful defence of Irish Commercial Court proceedings issued against it by Donatex Limited and Bernard McNamara. The plaintiffs sought damages of c. €100 million arising from a joint venture to purchase the Irish Glass Bottle site in Ringsend for €412 million in 2007.
  • Advising Esso Ireland in successful Commercial Court proceedings against Nine One One Retail Limited regarding the termination of a contractual relationship in respect of the operation of food service facilities in 32 stores around Ireland.
  • Acting for a multi-national financial institution in Irish Commercial Court proceedings arising from the alleged mis-selling of an investment bond.
  • Acting for Greencore plc in the defence of High Court proceedings issued by a fellow investor in an Irish company, alleging misrepresentation and breach of contract.
  • Advising Vodafone Ireland on the defence of a significant loss of earnings claim by an employee.
  • Advising Hibernia REIT in relation to statutory tenancy claims and other property-related matters.
  • Advising Aer Lingus on a contractual dispute relating to the leasing of equipment.
  • Advising Chubb Insurance Company of Europe in relation to Commercial Court proceedings issued against an insured party alleging negligent termination of a contract to provide services in a foreign jurisdiction.