
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
15 October 2025
Home Office publishes Statement of Changes in Immigration Rules HC 1333
Yesterday, the Home Office published the Statement of Changes in Immigration Rules (HC 1333). The Statement, the sixth of the year, introduces a…
29 September 2025
Matthew Wills quoted in The Scottish Herald on Reform UK’s proposal to abolish indefinite leave to remain
Matthew Wills (Partner) has been quoted by The Scottish Herald in an article discussing the potential impacts of Reform UK's proposal to abolish…
29 September 2025
Natasha Chell quoted in Times Higher Education on proposed international student fee levy
Natasha Chell (Partner and Head of Risk and Compliance) has been quoted in Times Higher Education in an article discussing the Government's proposed…
