Mason Hayes & Curran LLP | 28,020 followers on LinkedIn. Versatile & progressive law firm. We work collaboratively with businesses to find the best legal & commercial solutions. | 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?