Claire Massie

James Cox is a partner in the London office of Gibson, Dunn & Crutcher and a member of the firm’s Labour and Employment Practice Group. Mr. Cox has extensive experience in contentious and non-contentious labor and employment matters, with an emphasis on cross-border employment issues, collective labor and industrial disputes, redundancies and workforce restructurings, ARD/TUPE, the employment aspects of public and private mergers and acquisitions and outsourcing arrangements, corpor...

Philip Bowden is a top attorney recognized by Best Lawyers in the practice area(s) of Banking and Finance Law. Philip, 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 Philip is held by other top lawyers in the same geographic and legal practice area.

Carolyn Jackson helps clients solve complex cross-border issues involving the regulation of financial institutions and financial products, including derivatives. Carolyn's depth of knowledge and practical approach are shaped by her first-hand experience: she managed the New York trading desk of several investment banks and was formerly the executive director of the International Swaps and Derivatives Association, Inc. Trading firms, banks, asset managers, clearing houses and trading venues re...

Robert Spano is a top attorney recognized by Best Lawyers in the practice area(s) of Human Rights Law and Public International Law. Robert, who practices law in London, United Kingdom, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Robert is held by other top lawyers in the same geographic and legal practice area.

Graham Defries is a top attorney recognized by Best Lawyers in the practice area(s) of Life Sciences Law. Graham, 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 Graham is held by other top lawyers in the same geographic and legal practice area.

Neil Robson decodes complex UK and EU regulations to provide practical regulatory and compliance advice to financial services firms. He represents a range of financial market participants — hedge and private equity fund managers, investment advisors, broker-dealers and proprietary traders — that are based or doing business in the UK or the EU. Neil's extensive working knowledge of this complicated sector allows his clients to both meet their business objectives and satisfy regulat...

Mark Fennessy is the co-head of the London Finance, Restructuring and Special Situations Group. He focuses his practice on contentious and non-contentious restructuring and insolvency matters. He has particular experience in multifaceted group collapses and global insolvency issues. He has been involved in a number of high-profile assignments for banks, funds and various strategic parties. Mark leads a team with unrivalled expertise in special situations, including in relation to assets facin...

Penny Madden is an English qualified Queen’s Counsel and serves as Co-Partner-in-Charge of the London office at Gibson, Dunn & Crutcher. She is Co-Chair of the International Arbitration Practice Group and a member of the firm’s Transnational Litigation Practice Group. She has a wide range of experience in all key aspects of international arbitration with particular expertise in shareholder, telecommunications, SPA, energy, international trade and insurance disputes. She repres...

Cason Moore is a top attorney recognized by Best Lawyers in the practice area(s) of Mergers and Acquisitions Law and Private Equity Law. Cason, 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 Cason is held by other top lawyers in the same geographic and legal practice area.

David Birchall advises clients on the full range of energy transactions in the mid- and downstream fields, including types of commodity trading matters, conventional, renewables and clean-tech projects, energy and infrastructure projects, regulation and waste, including waste-to-energy schemes. Having practised as an energy corporate, regulatory and projects lawyer since 1993, he also worked from the start of the renewables and physical commodities trading legal market, in the UK, throughout ...