
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 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…
13 March 2026
Christi Jackson quoted in Newsweek on H-1B visas & school recruitment
Christi Hufford Jackson has been quoted in Newsweek in an article titled ‘How H-1B Visa Crackdown Is Set To Hit America’s Schools’.
6 March 2026
Home Office publishes Statement of Changes in Immigration Rules HC 1691 (5 March 2026)
On Thursday 5 March 2026, the Home Office published a new Statement of Changes in Immigration Rules (HC 1691) together with an accompanying…
