San Francisco

Mark O’Sullivan is a partner in the firm’s Tax Department and advises on all aspects of Irish corporate taxation.  His primary focus is advising overseas clients establishing operations and doing business in and through Ireland.  Mark also advises extensively on all aspects of international tax planning, including IP planning, cross-border reorganizations and financing transactions.

Emma practises corporate law and regularly spends time in the US with her clients. She works with international companies on the establishment, expansion and operation of their businesses in Ireland.

Emma also advises clients on the complex legal issues that can arise on international transactions involving Irish subsidiaries of foreign companies, including advising on a broad range of corporate reorganisations. She regularly leads group-wide multi-jurisdictional international restructuring projects.

Pat English is a Partner in the Corporate Department at Matheson. He is head of the firm’s market-leading International Business Group and co-head of the Firm’s US Business and Inward Investment Groups.

Pat is a highly experienced corporate lawyer focusing primarily on advising overseas clients on establishing operations and doing business in and from Ireland.

Kieran Trant is a partner and a member of the US Business and Inward Investment Groups at Matheson.

Kieran practices corporate law and works with international companies on the establishment, expansion and operation of their businesses in Ireland. Kieran also advises clients on the complex legal and commercial issues that can arise on international transactions involving Irish subsidiaries of overseas companies, including advising on a broad range of corporate reorganisations.

As their Irish corporate counsel, Kieran also advises multinational companies on a broad range of corporate governance and general commercial issues, including directors’ duties and compliance matters. In addition, he provides ongoing corporate advice and strategic counselling to clients, including advice in relation to distributions and complex cash repatriation strategies.

Kieran was previously seconded to Matheson’s Palo Alto and San Francisco offices and is a frequent visitor to the San Francisco Bay Area and other US locations where his clients are based.

Seóna is a partner in the firm’s International Business Group.

Seóna practices Irish corporate law, with a primary focus on advising US and other international clients on the Irish legal aspects of doing business in and from Ireland.