
Mary Cecilia Sweeney
Attorney
Sector: US Immigration
Location: London
MC is an attorney with the US team in London. Her practice areas include advising and preparing all categories of non-immigrant and immigrant cases, with particular emphasis on L-1 intra-company transfers and Blanket petitions, E-1 and E-2 treaty investors, O-1 persons with extraordinary ability, waivers of inadmissibility, EB-1 and family-based green cards. MC also advises on US citizenship matters including renunciation. Before joining LDI, she specialized in US litigation as a partner with boutique law firm Kaplan Landau LLP in New York.
History
2021-present – Laura Devine Immigration, London
2008-2017 – Kaplan & Landau LLP, New York
2006-2008 – Sullivan & Worcester LLP, New York
2003-2006 – Weil, Gotshal & Manges LLP, New York
Education
2004 – Admitted to the U.S. Federal Courts of the Eastern and Southern Districts of New York
2004 – Admitted to State Bar of New York
1999-2003 – Juris Doctorate, Fordham University School of Law, New York
Latest Insights
20 March 2026
Zeena Luchowa quoted in The Guardian regarding new rules preventing British dual nationals travelling to the UK without a British passport
Partner Zeena Luchowa has been quoted in The Guardian in an article regarding the impact of new rules requiring dual British nationals to travel to…
17 March 2026
US Government Reduces Renunciation of Citizenship Fee
The US government has announced a significant reduction in the fee to renounce US citizenship. Effective April 13, 2026, the Department of State…
13 March 2026
Home Office publishes updated sponsor guidance with important implications for employers
On Friday 6 March 2026, the Home Office published updated sponsor guidance (version 03/26), introducing a number of changes affecting employers who…
