Karen E. Knudsen, MBA, PhD, is the chief executive officer of the American Cancer Society (ACS) and its advocacy affiliate, the American Cancer Society Cancer Action NetworkSM (ACS CAN). As a well-respected cancer leader, researcher, and advocate, Dr. Knudsen guides the organization on our mission to save lives, celebrate lives, and lead the fight for a world without cancer. She has a strong commitment to ensuring that all people can benefit from the impact of our work. Prior to joining ACS, Dr. Knudsen served as executive vice president of Oncology Services and enterprise director for Sidney Kimmel Cancer Center at Jefferson Health, one of only 71 National Cancer Institute-designated cancer centers recognized for their research and impact on cancer outcomes.