Syndax Pharmaceuticals, Inc. announced the appointment of Steven Closter as Chief Commercial Officer, effective immediately. Mr. Closter will lead the Company's commercial strategy and operations, including marketing, sales, and market access, succeeding Steve Sabus, who is departing for personal reasons. Mr. Closter brings to Syndax over 30 years of commercial experience, which included the oversight of over a dozen product launches and indication expansions.

Prior to joining Syndax, he served in various roles at Sunovion Pharmaceuticals, which was consolidated into Sumitomo Pharma America in 2023, ultimately serving as Vice President, Brand Strategy and Launch Excellence. At Sunovion, he was responsible for global pre-commercialization, launch, marketing, sales, and market access strategies for products across neurology, psychiatry, and primary care therapeutics. Before Sumitomo, Mr. Closter spent nearly 20 years in senior marketing and commercial roles at Forest Laboratories, then Allergan, most recently serving as Vice President, Marketing, where he held responsibility for marketing products covering oncology, hospital-based anti-infectives, CNS, cardiovascular and other therapeutic areas.

He holds a Bachelor of Science in Business from Cornell University and a Master of Business Administration from the NYU Stern School of Business.