Gary Zieziula

President and Managing Director


Gary Zieziula is responsible for all areas of the business across the North America region, which includes the U.S. and Canada, including overseeing strategic planning and maximizing the growth of the organization by driving the performance of the company's franchises.

With more than 30 years of experience in the pharmaceutical industry and specialty care, Gary brings an accomplished career underscored by his ability to improve company performance.

Since taking over as President and Managing Director of EMD Serono in January 2016, Gary has strengthened the region's overall business performance, and overseen the launch of the company's Oncology and Fertility Technologies business, in addition to the company being named alongside MilliporeSigma as one of the "Top Places to Work" by the Boston Globe.

Gary joined EMD Serono in 2014 as Chief Commercial Officer after two years as an independent consultant focused on opportunity assessments for development-stage products, and mergers and acquisitions.

Previously, Gary led the financial growth of AMAG Pharmaceuticals as Executive Vice President and Chief Commercial Officer. Prior to joining AMAG Pharmaceuticals, he served as General Manager, and Vice President of Specialty Care at Roche, where he grew the company's multibillion-dollar specialty care US portfolio - including oncology, hepatitis c, virology, and transplant. Gary gained international experience serving as the Managing Director for Roche in Greece and also held multiple senior leadership positions at Bristol Myers Squibb and Merck & Co.

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