Johannes Oosthuizen

Executive Vice President and President, Oncology and MSD International, Merck & Co., Inc.

Johannes “Jannie” J. Oosthuizen has spent over a decade at Merck & Co., Inc. (“Merck”) in various sales, marketing and business roles. Beginning in 2026, Mr. Oosthuizen has served as executive vice president and president, oncology and MSD International, where he leads Merck’s global oncology business and holds P&L responsibility for U.S. Oncology and Merck’s 75-plus markets outside of the U.S., driving the company’s continued leadership in oncology and overseeing commercial execution at the market level across the full human health portfolio. From 2022 to 2026, Mr. Oosthuizen served as president, Merck Human Health U.S. where he oversaw P&L, strategy and commercialization for Merck’s broad U.S. portfolio. Prior to that, Mr. Oosthuizen was Merck's president, global oncology. Prior to Merck, Mr. Oosthuizen spent 21 years at Eli Lilly and Company in a wide range of commercial and marketing roles with increasing responsibility.