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Robert O'Shea "provides exceptional service levels for his international clients. They love him."

Chambers Global and Europe


Robert O'Shea is a partner and head of the Corporate Department at Matheson. He is co-head of the firm's US Business and Inward Investment Groups. Robert practises corporate law focusing primarily on the area of inward investment, international corporate reorganisations, post-acquisition integration and consolidation projects, spin­off transactions, cross-border mergers and acquisitions, joint ventures, general commercial contracts and corporate governance and compliance.

Robert has extensive experience in leading multi-jurisdictional transactions and has advised in relation to some of the largest inward investment and restructuring projects in Ireland. In particular he has extensive experience drafting and advising on the legal documentation associated with cross-border restructurings and inward investment projects and the complex legal issues that can arise in re-organisation projects.

Prior to joining Matheson in 2000, Robert previously worked with another of Ireland's largest corporate law firms where he practised in similar areas. Robert also spent time working in-house with the legal department of a large US pharmaceutical corporation, where he worked on international transactions.

Robert is a member of the Law Society of Ireland, the Law Society of England and Wales and an associate member of the American Bar Association (ABA). He is also a member of the European Committee of the ABA Section of International Law and also the M&A Multinational sub-committee. Robert has published and presented on a variety of corporate and international business law topics both in Ireland and overseas. He has also lectured extensively on various corporate and commercial law topics for the Law Society of Ireland, as well as at Irish universities and industry associations such as International Fiscal Association.

Experience Highlights

Recent transactions on which Robert and his team have advised include:

  • Standing corporate counsel to numerous international corporations in respect of their Irish operations.
  • Advising Fortune 100 US corporations on group-wide international restructurings.
  • Representation of international corporations on their establishment in Ireland.
  • Substantial integration projects pre and post mergers and acquisitions for various international clients
  • Ongoing strategic advice and counselling for a range of international corporations including in relation to cash and dividend repatriation strategies.

Robert O’Shea has "assembled a first-class corporate legal and governance team".
Corporate/M&A: Chambers Global 2022

"Matheson is a firm that I'd like to recommend in Ireland.  They are in my top three worldwide.  I'd recommend Robert O'Shea, in particular."
Corporate/M&A: Chambers Global 2022

Robert O’Shea's "technical acumen is top notch.  If you look for corporate support, he is heavily sought after by global multinationals.  He is terrific counsel and has a terrific bedside manner."  He is also "very approachable."
Corporate/M&A: Chambers Global 2022

Robert O'Shea "does great work, he is responsive and he always thinks of ways to help us move forward".
Chambers Europe 2021

Robert O'Shea is recommended.
European Legal 500 2019

Robert O'Shea leads the firm's corporate group. He is praised for providing "excellent advice which is both accurate and practical.”
Corporate: Chambers Global 2019

Recognised for Corporate Law.
Best Lawyers Ireland 2019 edition

Robert O’Shea has been recommended.
Healthcare and Life Sciences: European Legal 500 2018

Robert O’Shea has "deep experience in working with US companies".
European Legal 500 2018

Robert O’Shea is highly regarded.
Chambers Global & Europe 2018

Recognised for Corporate Law.
Best Lawyers Ireland 2018 edition

Robert O'Shea is recommended.
European Legal 500 2017

Clients praise Robert O'Shea for his "deep understanding of Irish corporate law".
Chambers Global & Europe 2017




Robert O'Shea is recognised as a leading lawyer by Best Lawyers.


Harvard Law School ("Leadership in Law Firms" programme)

Qualified as a solicitor in England and Wales (non-practising)

Qualified as a solicitor in Ireland University College Galway and Katholieke Universiteit Leuven, Belgium (LLB)

University College Galway (BA in Legal Science and History)