Chief Commercial Officer

Steve Closter has served as our Chief Commercial Officer since March 2024.

Previous Experience
Prior to joining Syndax, Steve served in various roles at Sunovion Pharmaceuticals, Inc., which was consolidated into Sumitomo Pharma America, Inc. 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 Pharma America, Inc., Steve spent nearly 20 years in senior marketing and commercial roles at Forest Laboratories, LLC, 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. Prior to Forest Laboratories, LLC, Steve spent six years at Dura Pharmaceuticals, Inc. in sales management positions of increasing responsibility.


Steve received a B.S. in Business from Cornell University and an M.B.A. from the New York University’s Stern School of Business.