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{{Infobox company
| name                = Mason Hayes & Curran
| logo                = File:Mason Hayes & Curran.png
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| type                = Limited liability partnership (LLP)
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| industry            = Legal services
| genre               = 
| predecessor         = <!-- or: predecessors = -->
| incorporated        = <!-- Legal jurisdiction of incorporation, often a country or US state. Sometimes otherwise, for example "England and Wales" -->
| founded             = 1970 
| founder             = Dermot Mason, Maurice Curran, Dermott Curran, Michael Hayes
| defunct             = <!-- {{End date|YYYY|MM|DD}} -->
| fate                =  Dermot Mason
| successor           = <!-- or: successors = -->
| hq_location         = Dublin, Ireland
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| num_locations       = {{ubl|Dublin (Ireland)|London (United Kingdom)|New York (United States)|San Francisco (United States)}}
| num_locations_year  = <!-- Year of num_locations data (if known) -->
| area_served         = Worldwide
| key_people          = {{ubl|William Carmody (Managing Partner)|Philip Nolan (Chair)}}
| products            = 
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| brands              = 
| services            = Full-service business law firm
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| num_employees       = 600+
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| ratio               = <!-- Basel III ratio; used for banks only -->
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| website             = [https://mhc.ie/ Mason Hayes & Curran]   
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}}

'''Mason Hayes & Curran''' (often referred to as “MHC”) is an Irish business law firm founded in 1970 and headquartered in Dublin, with international offices in London, New York and San Francisco.<ref>{{cite web |title=International Comparative Legal Guides |url=https://iclg.com/firms/mason-hayes-and-curran |website=International Comparative Legal Guides International Business Reports |accessdate=19 December 2025 |language=en}}</ref> 


==History==
The firm was established in 1970 through the merger of two long-standing practices: Walker Mason & Curran,  whose partners included Dermot Mason, Maurice Curran and his father Dermott Curran and Michael Hayes & Co., founded by Michael Hayes, who had served as Dublin City Sheriff since 1958.<ref>{{cite web |title=L500 {{!}} Mason Hayes & Curran LLP > Ireland {{!}} Legal 500 law firm profiles {{!}} Rankings |url=https://www.legal500.com/firms/10395-mason-hayes-curran-llp/c-ireland/rankings |website=www.legal500.com |accessdate=19 December 2025}}</ref>


Shortly after the merger, the firm was strengthened by the addition of several notable practitioners: Conal Clancy of CJ Clancy & Co., Stephen Dempsey of Patrick J. Brady & Co., Jack Cullen of JAK Cullen and James McWilliam of Henry B. Fotterell & Co.<ref>{{cite web |title=MHC initiative raises €45,000 for Focus Ireland |url=https://www.lawsociety.ie/gazette/top-stories/2025/october/mhc-initiative-raises-45000-for-focus-ireland/ |website=www.lawsociety.ie |accessdate=19 December 2025}}</ref>


Initially based at 6 and 7 Fitzwilliam Square, Dublin, the firm operated from this location for approximately 36 years before relocating in 2006 to new offices on Barrow Street, at the heart of Dublin’s “Silicon Docks” district.<ref>{{cite web |title=Mason Hayes & Curran publishes update on digital healthcare regulation |url=https://www.irishlegal.com/articles/mason-hayes-curran-publishes-update-on-digital-healthcare-regulation |website=Irish Legal News |accessdate=19 December 2025 |language=en |date=15 July 2025}}</ref>


On 25 May 2020, the firm was authorised by the Legal Services Regulatory Authority to operate as a limited liability partnership. Over time, the firm has expanded its international presence, establishing offices in Dublin, London, New York and San Francisco.<ref>{{cite web |title=Norman Fitzgerald joins Mason Hayes & Curran as partner |url=https://businessplus.ie/appointed/norman-fitzgerald-mhc/ |website=businessplus.ie |accessdate=19 December 2025 |date=13 October 2025}}</ref>


==Structure and size==
Mason Hayes & Curran is an Irish business law firm with 124 partners and total staff in excess of 600. The firm assists domestic and international clients from and during initial establishment and in meeting their ongoing legal and commercial imperatives through every business life cycle. The firm’s offices include Dublin, London, New York and San Francisco.<ref>{{cite web |title=Mason Hayes & Curran launches dedicated life sciences website |url=https://www.irishlegal.com/articles/mason-hayes-curran-launches-dedicated-life-sciences-website |website=Irish Legal News |accessdate=19 December 2025 |language=en |date=29 September 2025}}</ref>


==Services and sectors==
Mason Hayes & Curran offers a full-service commercial law practice across a range of sectors. According to its website, it serves sectors including: Built Environment; Charity and Not-for-Profit; Energy; Financial Services; Food, Agriculture & Beverage; Healthcare; Life Sciences; Public Law.<ref>{{cite web |title=Investment upturn lifts MHC turnover by 7% |url=https://www.lawsociety.ie/gazette/top-stories/2025/february/economic-factors-lift-mhc-turnover-by-7/ |website=www.lawsociety.ie |accessdate=19 December 2025}}</ref>


==Notable achievements==
* In October 2025, Mason Hayes & Curran announced that it was ranked by Mergermarket as #1 legal adviser in Ireland for M&A by deal volume for the first nine months of 2025, having advised on 38 transactions.
* In September 2024, a survey by Mason Hayes & Curran found that six in ten legal professionals preferred mediation over other forms of dispute resolution, reflecting the firm’s active role in ADR


==Recent developments==
* In May 2025 the firm announced the promotion of new senior lawyers including three new partners and seven of counsel, as part of its talent-development strategy for key sectors including technology, financial services and healthcare.
* In September 2025 the firm launched the dedicated site section called Capsule. It’s focused on the life sciences sector (medical devices, pharmaceuticals, digital health, cosmetics, food, chemicals), reflecting its growing regulatory and sector-specialism.
* In April 2024, a decision by the Workplace Relations Commission (WRC) ordered Mason Hayes & Curran to retrain its managers on disability policies and pay €5,000 compensation to a dismissed solicitor in a disability discrimination case.


==Corporate social responsibility and recognition==
Mason Hayes & Curran demonstrates a strong commitment to corporate, personal, and civic responsibility, both individually and collectively. The firm’s Corporate Social Responsibility (CSR) initiatives are guided by a fair and equitable approach, with a goal of investing up to 1% of its annual turnover across five key areas: Education, Pro Bono Support, Visual Arts, Environmental Responsibility, and Diversity, Equity & Inclusion. MHC’s dedication to community engagement and social impact has complemented its recognition by peer legal directories such as The Legal 500 and Chambers & Partners for its service, efficiency, and legal expertise.<ref>{{cite web |title=This week's new and notable appointments |url=https://businessandfinance.com/news/new-and-notable-appointments-at-bgf-ireland-azets-ireland-orbitus-bdo-ireland-mason-hayes-curran-and-access-bookings/ |website=Business & Finance |accessdate=19 December 2025}}</ref>


==References==
{{reflist}}


==External links==
* [https://www.mhc.ie/ Official website]
* [https://www.facebook.com/MHClawyersl Mason Hayes & Curran on Facebook]