Mr McElligott returns to the firm’s technology team as a partner, having previously served as a partner in the firm’s intellectual property team from 2018 to 2021.

A graduate of Trinity College Dublin, he brings 15 years’ experience in both private practice and in-house roles to the team.

Oisín Tobin, partner in the technology team, said: “We are delighted that Brian has re-joined and will bolster our offering to clients by providing bespoke advice in the area of AI, which is a natural evolution of our work at the cutting-edge of legal and technological developments.”

Mr McElligott added: “I am excited to bring my practical experience in the AI sector to Mason Hayes & Curran and look forward to ensuring that we can provide the optimal service to clients specialising in this emerging area of law.”

Separately, Mr Neilan, who trained with the firm over a decade ago and was promoted to partner in 2020, is relocating to San Francisco to head up the firm’s office there.

Philip Nolan, head of technology, said: “Jevan frequently acts as counsel for many of the West Coast’s best-known internet services companies, so this was a natural move for him.

“Through Jevan’s stewardship of our San Francisco based team, the firm will continue to provide additional support to our clients in the US, particularly those looking to expand into Ireland and Europe.”

Mr Neilan added: “I was seconded to our office in San Francisco shortly after it opened in 2017, so it is a huge honour to return and have the opportunity to further develop our presence on the West Coast. I will continue my work with the world’s leading tech companies to find solutions to complex and challenging privacy and other EU regulatory problems.”

Mason Hayes & Curran announced earlier this week that its revenue had increased by eight per cent to reach €106 million in 2022.