
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
13 August 2025
Natasha Chell quoted by DIGIT News
Natasha Chell (Partner and Head of Risk and Compliance) has been quoted by DIGIT.FYI in an article entitled 'New Phishing Campaign Targets UK Visa…
30 July 2025
Zeena Luchowa quoted in Personnel Today
Zeena Luchowa (Partner) has been quoted by Personnel Today in an article entitled ‘New migrant worker visa change will damage UK, says House of…
25 July 2025
Chambers & Partners High Net Worth 2025
The Chambers & Partners High Net Worth 2025 rankings were released this week and LDI is delighted to maintain our Band 1 ranking in the Immigration…