Timothy P. Walbert is currently senior advisor, Amgen. Most recently, Tim served as the chairman, president and chief executive officer of Horizon Therapeutics from 2008 to October 2023, when it was acquired by Amgen for $28.3 billion.

Before his tenure at Horizon, Tim served as president, CEO, and director of IDM Pharma Inc., leading the company to its acquisition by Takeda America Holdings in 2009. He also held senior positions at NeoPharm Inc., and Abbott (now AbbVie), where he led the global development and launch of HUMIRA®, a groundbreaking biologic for multiple indications. His earlier career includes key roles at G.D. Searle & Company, Merck & Co., and Wyeth, contributing to the launch and commercialization of many acute and chronic pain medicines, including CELEBREX®.

In addition to his executive experience, Tim serves on the boards of Mirum Pharmaceuticals, Century Therapeutics, Sagimet Biosciences, Odyssey Therapeutics and Cour Pharmaceuticals. He is a member of the National Organization for Rare Disorders (NORD) Advisory Board, the Wall Street Journal CEO Council, and the board of trustees of Muhlenberg College, where he earned a bachelor of arts in business. His previous board experience includes Aurinia Pharmaceuticals, Exicure (chairman), Assertio (chairman), Raptor Pharmaceutical Corp., XOMA Corporation, and Sucampo Pharmaceuticals. Tim is also actively involved in the Economic Club of Chicago, the Commercial Club of Chicago, and the Civic Committee of the Commercial Club of Chicago.