Mr Justin McKenna > Mason Hayes & Curran LLP > Dublin, Ireland > Lawyer Profile

Mason Hayes & Curran LLP
D04 TR29
Justin McKenna photo

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Justin is a partner in MHC’s Corporate team, specialising in corporate finance, mergers & acquisitions and private equity transactions. He has extensive experience in corporate transactions with emphasis on all aspects of offers for, or the acquisition or disposal of, interests in public companies and the regulation of such transactions, public offers of equity securities, private equity transactions and investment and acquisition transactions involving management groups.

Justin has advised bidders, shareholders, financial advisers and other parties involved in many of the public-to-private transactions which have taken place in Ireland involving quoted companies over recent years in addition to many high profile and complex transactions involving the acquisition of or investments in enterprises. Justin will be appointed to the board of the Irish Takeover Panel in April 2021 as nominee of the Law Society of Ireland.

He also advises in relation to the resolution of disputes between shareholders and demergers/separations of interests in complex and sensitive investment and shareholder matters.

International directories have consistently ranked Justin as one of Ireland’s leading corporate lawyers over the last several years – including in the current editions of PLC Which Lawyer and the Chambers Global Guide to the World’s leading lawyers.


Law Society of Ireland.


University College Dublin (BCL) C Dip. AF.

Lawyer Rankings

Ireland > Commercial, corporate and M&A

(Leading individuals)

Justin McKennaMason Hayes & Curran LLP

Mason Hayes & Curran LLP has a substantial team with a sizeable market share of major transactions in Ireland. Technology, healthcare, life sciences, financial services, energy and charities are key sectors for the firm. The team is also active in both corporate M&A and private equity investments. David O’Donnell leads the team and is a senior name in the market, attracting engagements from a number of foreign multinationals and bulge-bracket financial institutions. Justin McKenna is rated for cross-border M&A and deals involving Irish takeover rules. Martin Kelleher is experienced in pharma and life sciences, technology and financial services deals, and Liam Brazil  is noted for his renewable energy expertise. Claire Lord  heads the corporate governance and compliance team. Ron Boucher  joined the team as a partner from Jones Day’s London office in November 2020.

Ireland > Capital markets

(Leading individuals: Capital markets: Equity)

Justin McKennaMason Hayes & Curran LLP

Mason Hayes & Curran LLP operates primarily in the structured finance, securitisation and derivatives fields. It has a further presence in corporate debt and ECM, along with public M&A transactions. The firm is particularly close to international issuers. It is a growing force in structured note programmes, notably for corporate trustees and agencies. Daragh O’Shea and David Mangan have played a pivotal role in building the firm’s DCM and structured finance standing in recent years, while Justin McKenna  has maintained its status in ECM.