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Sidley Grows Energy and Infrastructure Capabilities in New York With Partner John Thomas
February 9, 2026
New York – Sidley is pleased to announce that John Thomas has joined the firm’s Energy, Transportation, and Infrastructure practice in Sidley’s office in New York. Mr. Thomas joins from Willkie Farr & Gallagher LLP, where he was a partner in the Corporate & Financial Services Department and Co-Chair of the Energy & Commodities Practice Group.
Mr. Thomas focuses on physical commodity and commodity derivative trading matters, commodity-linked financing transactions, and commercial transactions involving the purchase, sale, transportation, and storage of commodities across multiple jurisdictions. His transactional experience in the commodities markets includes M&A transactions, intermediation transactions, and secured and structured finance transactions, as well as related corporate governance, regulatory and compliance matters. Mr. Thomas also spent over a decade working for J. Aron & Company, the commodities division of Goldman Sachs, where he was for many years a managing director and lead lawyer for that global business.
“John’s practice is a hybrid of structured finance and M&A transactions in the energy space, which complements our existing capabilities and will allow him to collaborate with other partners on energy and physical commodity transactions,” said Brian Fahrney, chair of Sidley’s Executive Committee. “John‘s client relationships in New York will also help us expand our capabilities in one of the country’s key energy markets.”
“John is a leader in his field and has been involved in a number of innovative transactions,” said Cliff Vrielink, a member of Sidley’s Executive Committee and global leader of the Energy, Transportation and Infrastructure practice. “Many of our partners have worked with John, and we are excited to bring him on to bolster our energy and infrastructure team.”
Other recent additions to Sidley’s leading Energy, Transportation, and Infrastructure practice include Alun Evans in Singapore, as well as Steven Tredennick and Paris Theofanidis in Houston.
Sidley’s Energy, Transportation, and Infrastructure practice offers broad experience advising clients in the energy, digital media, transportation, and logistics industries, ranging from transactional, regulatory, and litigation support. Sidley is also ranked Band 1 USA - Nationwide Energy Transition in the most recent Chambers rankings. Lawyers in the practice have been recognized as leading practitioners by Chambers, Who’s Who Legal, The Legal 500, Project Finance International, IFLR, and Euromoney.
Sidley is an elite global law firm. With approximately 2,300 lawyers and 160 years of experience, we have established a reputation for deploying innovative legal strategies to achieve powerful results for our clients in complex transactional, restructuring, crisis management, investigation, regulatory, and litigation matters.
Our perspective and reach are truly global, supported by 21 offices strategically situated in key commercial, regulatory, and financial centers across the world. Our lawyers and business professionals, fluent in more than 75 languages, possess the cultural awareness and cross-border legal acumen needed to bring clarity to a dynamic business landscape.
Attorney Advertising—Sidley Austin LLP is a global law firm. Our addresses and contact information can be found at www.sidley.com/en/locations/offices. Sidley and Sidley Austin refer to Sidley Austin LLP and affiliated partnerships as explained at www.sidley.com/disclaimer.
Mr. Thomas focuses on physical commodity and commodity derivative trading matters, commodity-linked financing transactions, and commercial transactions involving the purchase, sale, transportation, and storage of commodities across multiple jurisdictions. His transactional experience in the commodities markets includes M&A transactions, intermediation transactions, and secured and structured finance transactions, as well as related corporate governance, regulatory and compliance matters. Mr. Thomas also spent over a decade working for J. Aron & Company, the commodities division of Goldman Sachs, where he was for many years a managing director and lead lawyer for that global business.
“John’s practice is a hybrid of structured finance and M&A transactions in the energy space, which complements our existing capabilities and will allow him to collaborate with other partners on energy and physical commodity transactions,” said Brian Fahrney, chair of Sidley’s Executive Committee. “John‘s client relationships in New York will also help us expand our capabilities in one of the country’s key energy markets.”
“John is a leader in his field and has been involved in a number of innovative transactions,” said Cliff Vrielink, a member of Sidley’s Executive Committee and global leader of the Energy, Transportation and Infrastructure practice. “Many of our partners have worked with John, and we are excited to bring him on to bolster our energy and infrastructure team.”
Other recent additions to Sidley’s leading Energy, Transportation, and Infrastructure practice include Alun Evans in Singapore, as well as Steven Tredennick and Paris Theofanidis in Houston.
Sidley’s Energy, Transportation, and Infrastructure practice offers broad experience advising clients in the energy, digital media, transportation, and logistics industries, ranging from transactional, regulatory, and litigation support. Sidley is also ranked Band 1 USA - Nationwide Energy Transition in the most recent Chambers rankings. Lawyers in the practice have been recognized as leading practitioners by Chambers, Who’s Who Legal, The Legal 500, Project Finance International, IFLR, and Euromoney.
Sidley is an elite global law firm. With approximately 2,300 lawyers and 160 years of experience, we have established a reputation for deploying innovative legal strategies to achieve powerful results for our clients in complex transactional, restructuring, crisis management, investigation, regulatory, and litigation matters.
Our perspective and reach are truly global, supported by 21 offices strategically situated in key commercial, regulatory, and financial centers across the world. Our lawyers and business professionals, fluent in more than 75 languages, possess the cultural awareness and cross-border legal acumen needed to bring clarity to a dynamic business landscape.
Attorney Advertising—Sidley Austin LLP is a global law firm. Our addresses and contact information can be found at www.sidley.com/en/locations/offices. Sidley and Sidley Austin refer to Sidley Austin LLP and affiliated partnerships as explained at www.sidley.com/disclaimer.
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