Barry O'Leary

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 ...

Pillsbury Corporate partner Osama Abu-Dehays is known throughout the Middle East and North Africa for his commercial, technology, media and telecommunications law experience. Based in London, Osama represents broadcasters, football leagues and telecom/technology providers. He crafts licensing deals, litigates intellectual property disputes, and advises on regulatory and corporate matters. Osama has drafted media and sports regulations, and has advised on numerous high-profile, politically sen...

Till Lefranc is a partner in the London office of Gibson, Dunn & Crutcher. Mr. Lefranc is a member of the Private Equity, Mergers and Acquisitions and Capital Markets practice groups. Mr. Lefranc’s practice focuses on private equity, M&A and capital markets transactions across Europe. He advises clients on cross-border acquisitions and divestitures, growth capital investments, buy-outs, shareholder arrangements, minority investments, and management equity arrangements. He also a...

Elisabeth I. Baltay is a top attorney recognized by Best Lawyers in the practice area(s) of Insolvency and Restructuring Law. Elisabeth I., 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 Elisabeth I. is held by other top lawyers in the same geographic and legal practice area.

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...

Charlie Caher is a top attorney recognized by Best Lawyers in the practice area(s) of International Arbitration. Charlie, 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 Charlie is held by other top lawyers in the same geographic and legal practice area.

Anthony Maton has more than 25 years' experience of litigating claims in the UK, Europe and across the globe. In 2009, Anthony co-founded Hausfeld & Co LLP in London which he led as Managing Partner until 2021. He was appointed Global Co-Chair in January 2022.

Aymen Mahmoud is the co-head of the London Finance, Restructuring and Special Situations Group. He focuses his practice on complex debt financing transactions for private equity funds and their portfolio companies, hedge funds, corporate borrowers and issuers and other financial institutions including banks, direct lenders, family offices and other alternative sophisticated capital. His experience includes acting in respect of direct lending, leveraged buyouts, domestic and cross-border syndi...

Al Gourley is a Partner at the firm’s London office. He is a globally-recognised resource lawyer, having led many UK and Canadian initial public offerings, secondary and alternative finance transactions, as well as mergers and acquisitions, in the resource sector, particularly cross-border transactions involving Europe, Africa, Australia and Canada. Al is also the Chairman of the World Initiative of Mining Lawyers based in Europe. Al is known for his knowledge of “pure” mini...

Justin Watts is an experienced patent litigator who has an established and well-regarded intellectual property practice. Clients rely on his industry knowledge and years of experience to handle their complex, multinational disputes. Dr. Watts represents a variety of clients, with an emphasis on those in the pharmaceutical, medical devices, biotechnology, communications, and hardware and software industries, in disputes involving standards, competition law and patents. Dr. Watts' experience en...