George Tidmarsh

George Tidmarsh (born 1960) is an American politician and businessman who served as the Director of U.S. Center for Drug Evaluation and Research from July to October 2025. He was also the temporary Director of U.S. Center for Biologics Evaluation and Research after Vinay Prasad resigned, until Prasad returned 10 days later.

Education Tidmarsh attended Stanford University for his undergraduate degree and subsequently MD and PhD in Cancer Biology.

Career Prior to taking a role in the second Trump administration, Tidmarsh was described as a serial entrepreneur,

He was also an adjunct professor at Stanford University School of Medicine and founded a master's degree program in translational research and applied medicine.

Controversy Tidmarsh was placed on administrative leave from the CDER in October 2025 by Marty Makary after accusations of abusing his regulatory authority. A suit was also filed against him by Aurinia Pharmaceuticals claiming Tidmarsh misused his authority to target a businesses of a former associate, and publicly questioning the previous FDA approval of its drug voclosporin. stating he left to protest the handling of drug reviews at the FDA.