Leading the charge

Led by a mission-driven team, Innoviva Specialty Therapeutics blends rigorous medical science with the latest in pharmaceutical innovation

Executive Team

Matt Ronsheim, PhD


Dr. Ronsheim is a seasoned pharmaceutical executive with more than 20 years of leadership experience. He was the former President of Entasis Therapeutics, which was acquired by Innoviva in 2022. Previously, he held leadership and executive positions in areas including CMC, pharmaceutical development, and commercialization at companies including Merck/Cubist Pharmaceuticals, Enanta Pharmaceuticals, and Forest Laboratories. He holds a PhD in Chemistry from the University of New Hampshire.

David Altarac, MD, MPA

David Altarac, MD, MPA

Chief Medical Officer

Dr. Altarac is an infectious diseases physician and pharmaceutical executive with more than 20-years’ experience leading clinical and regulatory functions. He previously served as the Chief Medical Officer of Entasis Therapeutics and held leadership positions at Shire Pharmaceuticals, NeoStem, Inc., and Merck & Co. in therapeutic areas including infectious diseases, oncology, ophthalmology, inflammation, and rare diseases. Dr. Altarac holds an M.D. degree from New York Medical College, a Master of Public Administration (M.P.A.) degree from New York University, and a B.A. in Chemistry from the State University of New York at Binghamton, NY.

Pavel Raifeld, CFA

Chief Executive Officer, Innoviva

Pavel brings deep financial and strategic expertise from experiences at Sarissa Capital Management, Credit Suisse’s healthcare investment banking, and biopharmaceutical consulting at McKinsey & Company and BCG. He holds a BA from Harvard and an MBA from Columbia University.

Steve Basso, Chief Financial Officer

Steve Basso

Chief Financial Officer, Innoviva

Mr. Basso brings more than 30 years of experience of financial leadership, primarily in the pharmaceutical industry. Prior to joining Innoviva, Mr. Basso served as the Chief Financial Officer and Chief Operating Officer at Cybrexa Therapeutics and has held a variety of financial leadership positions at Inozyme Pharma, Alexion Pharmaceuticals and Pfizer. He received a BS in business from Providence College and an MBA from Boston College.

Marianne Zhen

Chief Accounting Officer, Innoviva

Joining Innoviva in 2014, Marianne previously served as Corporate Controller for three tech companies. A member of the AICPA and the CalCPA, she also served on the CalCPA Peninsula Silicon Valley Chapter board. Marianne holds a BS in Business Administration from San Francisco State University.


Join a team where all colleagues can do their best work while making a lasting impact.

Learn More