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


Change in thresholds for sponsor company size classification from 6 April 2025

On 6 April 2025 the criteria used to define small companies under the Companies Act 2006 changed, impacting relevant companies responsible for paying…

Laura Devine Immigration partners and solicitors featured on 2025 Pro Bono Recognition List

We are delighted to announce the inclusion of six LDI lawyers on the 2025 Pro Bono Recognition List published this morning – congratulations to…

British citizenship – addressing wrongs of the past

British nationality law has been riddled with discrimination, and it has evolved to put this right. This article focuses on one of the latest…