Andy is a partner in the Litigation, Dispute Resolution and Investigations Group.

Andy advises on a wide range of commercial disputes, through conciliation, mediation and arbitration, as well as through traditional litigation.  He specialises in advising on disputes relating to competition/anti-trust matters, data and privacy, professional negligence, banking and financial services, company acquisitions/sales and joint ventures, commercial contracts and insurance and reinsurance contracts. He has extensive experience in both international and domestic commercial arbitration, including under the UNCITRAL, ICC, AAA and LCIA Rules.

Andy also has extensive experience in acting on behalf of entities who are subject to investigation by regulators including the Central Bank of Ireland and the Competition and Consumer Protection Commission.

Relevant Experience

  • Advising Volvo trucks / Renault trucks in relation to multiple follow on actions brought in the High Court in Ireland by purchasers of trucks arising out of a decision of an EU Commission decision to fine a number of truck manufacturers (including Volvo trucks / Renault trucks) a total of €2,926,509,000
  • Advising CRH plc (the second largest buildings materials group in the world) in defending related competition proceedings brought by Framus Limited (and related companies in Liquidation) and Goode Concrete concerning alleged anti-competitive practices in the Concrete and Cement industries in Ireland
  • Advising ABB Limited in respect of a follow on action for damages brought by ESB Limited arising out of an EU Commission decision concerning cartel activity in the gas insulation switch gear sector
  • Advising Mars in relation to a claim for damages against HB Ice Cream Limited (owned by Unilever) for breaches of competition law in the impulse ice cream market in Ireland
  • Advising Beef Industry Development Society in respect of a legal challenge brought by the Irish Competition Authority in respect of a proposed rationalisation scheme for the beef processing sector in Ireland
  • Advising CRH plc on a successful High Court and Supreme Court challenge to the scope of documentation seized by the CCPC during a dawn raid at its wholly owned subsidiary, Irish Cement Limited
  • Advising in a professional negligence claim brought by a Cayman Island insurer against a major accountancy firm in which the plaintiff was claiming a sum in excess of $60 million
  • Advising a major accountancy firm in relation to audits carried out by that firm of Irish funds involved in significant “Madoff” investments
  • Advising a major French bank in a professional negligence claim against a fund administrator concerning significant investments made into specified funds
  • Advising a major Irish plc in relation to a significant international joint venture dispute under the ICC rules where the applicable law was a foreign law and the seat of the Arbitration was in Paris


“Andrew Lenny is very customer-focused and has the ability to communicate well with key stakeholders with a proactive and innovative approach.”

Chambers Europe: Europe’s Leading Lawyers for Business, 2023

“No matter the challenge, he always brings a calm perspective and steers us straight. His depth of experience and partner engagement is very reassuring from a customer perspective when dealing with challenging aspects.”

Chambers Europe: Europe’s Leading Lawyers for Business, 2023

Andrew Lenny is “commercially astute and extremely practical, which enables him to deliver top-class advice.”

Chambers Europe: Europe’s Leading Lawyers for Business, 2022

Andrew Lenny offers “good tactical advice in a complex area.”

Chambers Global: The World’s Leading Lawyers for Business, 2021

Education & Qualifications

  • LLB, 1989, University of Liverpool
  • Admitted as a solicitor in Ireland, 1997
  • Admitted as a solicitor in England & Wales (non-practising), 1993
  • CEDAR Accredited Mediator
  • Member of the Executive Committee of Arbitration Ireland