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Up and Coming
Provided by Liam Heylin
Antitrust and Competition, Foreign Investment Screening
Liam Heylin graduated from University College Dublin (LLM) in 2010 and qualified in 2013. He joined McCann FitzGerald LLP in 2025 as a Partner. Liam specialises in merger control, cartels, abuse of dominance, competition litigation and State aid. He has considerable experience advising regarding complex merger control and foreign investment screening reviews at EU and national level, and multijurisdictional antitrust investigations concerning cartels and abuse of dominance. Liam also advises clients about complex competition litigation proceedings actions before the Irish courts. He routinely advises on other behavioural and regulatory matters such as distribution systems, co-operation agreements, and joint ventures. Liam also has extensive experience advising on all aspects of EU State aid law. Liam advises across a multitude of industries including technology; financial services; life sciences; consumer products; aviation; energy; and natural resources and media and telecommunications.
The Law Society of Ireland, 2013
Provided by Chambers
Liam Heylin joined McCann FitzGerald in October 2025. He is active across a range of competition matters. He frequently assists clients with merger control filings, as well as acting on abuse of dominance allegations, state aid matters and compliance with EU legislation, especially for clients in the technology sector.