Mr David O'Donnell > Mason Hayes & Curran LLP > Dublin, Ireland > Lawyer Profile

Mason Hayes & Curran LLP
D04 TR29
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Work Department



David is a partner and head of MHC’s Corporate team, practicing in the areas of mergers and acquisitions, securities law, joint ventures, private equity and venture capital, corporate establishments and corporate finance.

David advises a broad range of clients including global corporates doing business in and through Ireland and some of Ireland’s leading corporates and entrepreneurs. David advises clients on the structuring of acquisitions and divestments both in Ireland and on a cross border basis.

David also advises general partners and limited partners on the structuring of venture capital funds and the investment by those funds in investee companies. He also has extensive experience in advising global corporates and international private equity firms on merger and acquisition transactions and intra-group restructurings.


Law Society of Ireland; Advisory Committee of Business Angels Partnership; Chairman of the Closely Held and Growing Enterprises Committees, International Bar Association ( 2005-2007); President of Trinity Business Alumni – 2011.


University of Dublin, Trinity College (LLB).

Lawyer Rankings

Ireland > Commercial, corporate and M&A

(Hall of Fame)

David O’DonnellMason Hayes & Curran LLP

The ‘highly professional and competent‘ team at Mason Hayes & Curran LLP has extensive experience of domestic and cross-border M&A, private equity transactions and group reorganisations. It has particular expertise in the technology, energy, life sciences and charity sectors. In addition, the commercial practice advises on large outsourcings and distribution agreements. David O’Donnell heads up the corporate team, which includes Justin McKenna, who is particularly experienced in public M&A. Martin Kelleher has notable expertise in the life sciences sector, while new partner Conall Geraghty stands out for his advice to fast-growth businesses. Claire Lord leads the corporate governance and compliance team.