William Dillonleetch, Partner at Mason Hayes & Curran LLP

William Dillonleetch

Partner at Mason Hayes & Curran LLP | Ireland

Profile last verified July 2026
Law Practice Verified Profile Ireland Admitted as a Lawyer of the Supreme Court of New South Wales
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(**) *** *** 414

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William Dillonleetch Socials
William Dillonleetch Work Experience

Partner at Mason Hayes & Curran LLP in September 2018 - Present

Senior Associate at McCann FitzGerald in July 2013 - September 2018

Senior Associate at K&L Gates in October 2010 - May 2013

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Lawyer at Kingfisher/HF Lawyers in July 2009 - August 2010

Solicitor at Matheson Ormsby Prentice in October 2004 - December 2008

William Dillonleetch Education

Admitted as a Lawyer of the Supreme Court of New South Wales, August 2026

Admitted as a Solicitor in England & Wales, August 2026

Admitted as a Solicitor in Ireland, August 2026

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The London School of Economics and Political Science (LSE), LLM, August 2026

Trinity College Dublin, LLB, August 1998 to August 2026

Glenstal Abbey School, August 1992 to August 1998

About William Dillonleetch’s Current Company
Mason Hayes & Curran LLP

Mason Hayes & Curran LLP is a leading Irish law firm based in Dublin with offices in San Francisco, New York and London, three of Ireland’s most important conduits for inward investment to Ireland. We are a business law firm with extensive knowledge and experience in the following sectors: Energy, Technology, Financial Services, Built Environment and Healthcare & Life Sciences. Why MHC? As a leading progressive law firm, we offer an excellent remuneration and benefits package, access to an enviable client base and strong career progression for the right candidates. We are proud of, and value the organisation’s friendly and informal working atmosphere. Our open plan layout is unusual for a law firm and means that everyone has the same desk, even the Managing Partner. We encourage staff involvement at all levels and are committed to fostering a climate of open communication across the firm. Our Firm Mason Hayes & Curran LLP is a business law firm with 124 partners. We understand the challenges international organisations face when investing or locating in a foreign country. We assist them during initial establishment, and in meeting their ongoing legal and commercial imperatives. Quality Approach We empower our international and domestic clients by giving focused recommendations and a clear understanding of options. This allows clients to confidently make quality, informed decisions. We pride ourselves in working collaboratively and openly. We believe this creates a shared perspective and builds trust so that solutions are developed quickly and together. We are versatile, recognising each client’s preferred way of working and responding to it. CSR Corporate social responsibility is a natural fit with the way we do business. We invest in our society and communities through a range of programmes. Our core focus is education.

Discover more about Mason Hayes & Curran LLP
William Dillonleetch’s Colleagues
Conall Geraghty

Conall Geraghty

Ireland

Helping founders scale ideas to unicorns | Corporate Partner | Legal500 Next Generation Partner

Corporate Partner at Mason Hayes & Curran LLP
(May 2020 – Present)

Rob Mcdwyer

Rob Mcdwyer

Dublin, County Dublin, Ireland

Partner, Energy at Mason Hayes & Curran LLP

Partner at Mason Hayes & Curran LLP
(May 2023 – Present)

Feidhlim Seoighe

Feidhlim Seoighe

Ireland

Solicitor | Aviation Finance & Leasing

Solicitor | Aviation Finance & Leasing at Mason Hayes & Curran LLP
(January 2025 – Present)

Anthony Hanlon

Anthony Hanlon

Ireland

Partner, Investment Funds at Mason Hayes & Curran LLP

Partner at Mason Hayes & Curran LLP
(March 2024 – Present)

Ruth Meenan

Ruth Meenan

Ireland

Senior Associate Lawyer, Healthcare at Mason Hayes & Curran LLP

Senior Associate, Healthcare at Mason Hayes & Curran LLP
(September 2022 – Present)

Louise Mulrennan

Louise Mulrennan

Dublin, County Dublin, Ireland

Associate | Technology, Data and AI Lawyer | Mason Hayes & Curran LLP

Pro bono Solicitor (volunteer) at Community Law & Mediation (CLM)
(April 2023 – Present)

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Frequently asked questions about William Dillonleetch

What is William Dillon-leetch email address?

Email William Dillon-leetch at [email protected] and [email protected]. This email is the most updated William Dillon-leetch's email found in 2026.

How to contact William Dillon-leetch?

To contact William Dillon-leetch send an email to [email protected] or [email protected]. (updated on November 07, 2025)

What company does William Dillonleetch work for?

William Dillonleetch works for Mason Hayes & Curran LLP.

What is William Dillonleetch's role at Mason Hayes & Curran LLP?

William Dillonleetch is Partner

What industry does William Dillonleetch work in?

William Dillonleetch works in the Law Practice industry.

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