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Susan O’Reilly, of Counsel, specialises in corporate and commercial. She joined the firm in 2023.

With over 20 years’ experience advising Irish and international clients on a range of corporate and commercial law matters, Susan previously worked for Whitney Moore and prior to that spent a number of years working in London.

Susan has extensive experience in private equity and venture capital investments, and regularly advises on early and later stage investments for high potential start-up and SME companies. She acts for both investors and investee companies across all sectors.

She also has considerable expertise in mergers and acquisitions, corporate restructuring, and cross-border transactional work for private companies. She has advised on numerous large-scale share and asset purchases, representing national and international clients and advising on either side of a transaction, as buyer or seller.

Her practice areas also include commercial agreements, joint venture arrangements, corporate governance matters and company law generally.

Recent Work Highlights

  • Advised Siga Hydro Limited, an Irish company in the clean energy and renewable sector, in relation to an equity stake acquired by Foresight Energy Infrastructure Partners, a listed energy transition fund based in the UK.

  • Advised a university based in the west of Ireland on the transfer of the assets and undertaking of a college into and to form part of that university.

  • Advised start-up and early-stage companies in the sustainability, software and Artificial Intelligence sectors on multiple investment rounds, shareholders’ agreements and commercial contracts.

Professional Activities

  • Member of the Law Society of Ireland


  • University of Cambridge, LLM
  • University College Dublin, BCL
  • Admitted as a solicitor in England and Wales
  • Admitted to the Law Society of Ireland 
Very responsive, professional, and excellent service overall. Personable, experienced team. Practical solutions. The business is progressive with heavy investment in technology to underpin a great customer experience.

Commercial, Corporate and M&A | Legal 500 EMEA 2023

The corporate team is highly flexible and responsive, has assisted us with a major acquisition as well as several transactions and company secretarial projects. The team are strong on commercial, practical and legal knowledge.

Commercial, Corporate and M&A | Legal 500 EMEA 2023

The team are always available, proactive, responsive and personable. Great experience across the team, and a hunger and determination to hit milestones and deadlines. They stay until the work is done.

Commercial, Corporate and M&A | Legal 500 EMEA 2023

Awards, Membership and Recognition