Haynes Boone welcomed partner John Messina to its New York office and finance practice group, where he will focus on derivatives and structured finance.
Messina brings more than 20 years of experience advising financial institutions, issuers and market participants on derivatives, securities law and structured finance matters. His practice focuses on over-the-counter equity derivatives, issuer-related transactions, margin lending and a range of structured products.
“John’s arrival reflects the continued expansion and sophistication of our New York finance platform,” Craig Unterberg, managing partner of Haynes Boone’s New York office, said. “We are focused on delivering high-value solutions for our clients, and his derivatives experience and strong market relationships further enhance the quality and depth of our capabilities.”
Before joining Haynes Boone, Messina served as a director at Barclays, supporting the bank’s equity derivatives business and advising on complex capital markets and structured transactions. Earlier in his career, he practiced at Sullivan & Cromwell, advising on securities, capital markets and M&A matters.
“Haynes Boone has built an impressive finance platform with a strong presence in New York,” Messina said. “I’ve known many of the lawyers in the group for years and have seen firsthand the high-quality work they handle for clients. I’m excited to join a team operating at that level and share my experience in derivatives, structured finance and securities law.”







