
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
18 December 2025
Frequently asked questions on the earned settlement proposals
Frequently asked questions regarding the government's earned settlement proposals
16 December 2025
Reminder: Immigration Skills Charge increases from 16 December 2025
From today, 16 December 2025, the Immigration Skills Charge (ISC) increases by 32% via The Immigration Skills Charge (Amendment) Regulations 2025
16 December 2025
Christi Jackson writes for People Management on business expansion to the US
Christi Hufford Jackson (Partner and Head of US Immigration) has written an article for People Management discussing business expansion to the US.
