Sean O'Sullivan

Cy Benson is a U.S. and English qualified partner in the London office of Gibson, Dunn & Crutcher and serves as Co-Chair of the firm’s International Arbitration Practice Group. Mr Benson represents clients from a wide variety of sectors before commercial and investment treaty tribunals with particular experience in telecoms, oil & gas, mining and infrastructure disputes. He continues to represent a Dutch and a Luxembourg investor in two separate multi-billion dollar arbitration ...

Helen Croke joined Ropes & Gray as a partner in its private equity transactions group in October 2016. She specialises in UK and international private equity and M&A, including acting for institutional investors, corporates and founders. Helen is recommended by Chambers UK and The Legal 500 as a leading individual in private equity who clients say is “fantastic” with a “unique ability to articulate complicated aspects in layman’s terms.” Helen was recogni...

Peter Newman is a top attorney recognized by Best Lawyers in the practice area(s) of Insolvency and Restructuring Law. Peter, who practices law in London, United Kingdom, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Peter is held by other top lawyers in the same geographic and legal practice area.

Eve Ellis is a partner in Ropes & Gray’s asset management group specializing in financial services regulation. Eve provides advice across a broad range of regulatory matters with a particular focus on fund regulation and has done so for over 15 years. In the latest edition of The Legal 500, clients describe Eve as “excellent,” “personable, accessible, very knowledgeable and commercially-focused.” Peers comment they are “impressed by her knowledge and co...

Anna Nolan is counsel in the Financial Restructuring & Reorganization Practice in Alston & Bird’s London office. With over 10 years of experience, Anna assists a wide range of clients including hedge funds, special situations investors, trustees, providers of rescue and exit finance, issuers, sponsors, bondholder committees, administrators, and debtors with distressed transactions, conducting corporate, and financial restructurings and general insolvency matters.

Jane Rogers is a partner in Ropes & Gray’s finance group in London, a member of the firm’s policy committee and a former co-head of the firm’s global finance practice. She focuses on private equity and debt financing transactions and was previously based in the Boston office before relocating to London in 2010.Jane regularly represents corporations and private equity funds in a variety of financing transactions, including high yield debt offerings, syndicated credit faci...

Stephen Pollard is a seasoned litigator with more than 30 years of experience in the full spectrum of business crime and securities enforcement work. During his career, Mr. Pollard has been involved in most of the significant business crime investigations and prosecutions brought by the UK authorities. Mr. Pollard has particular experience in representing senior individuals from public and private companies, including those from the financial services sector. In addition, Mr. Pollard is regul...

Rohan Massey is a top attorney recognized by Best Lawyers in the practice area(s) of Privacy and Data Protection Law. Rohan, who practices law in London, United Kingdom, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Rohan is held by other top lawyers in the same geographic and legal practice area.

Hamid Yunis advises clients on complex areas of transactional law (M&A, Investments, Private Equity, Major Projects and Corporate Finance) predominantly within the health industry and on infrastructure transactions. He has substantial global experience in innovative structures for complex joint ventures, public-private partnerships and funding arrangements. Hamid’s global client base includes health care providers, medical products manufacturers and organizations establishing &ldquo...

Vincent Zabielski focuses on international nuclear energy matters, including providing strategic advice related to new-build EPC contracts, power purchase agreements, operation and maintenance, fuel supply chain, liability issues, and export controls. Prior to joining Pillsbury, Vincent was Senior Nuclear Counsel for the UAE nuclear new build program, where he was responsible for integration of nuclear licensing strategy with the largest-ever public financing of a public works project. During...