Leonard has more than 30 years of experience with all stages of drug development, from early discovery through FDA approval. He was a Founder and Chief Scientific Officer of LEAD Therapeutics, which was later acquired by BioMarin Pharmaceuticals where he then served as the Chief Scientific Officer. At LEAD and BioMarin, he worked on the discovery and early development of the PARP inhibitor talazoparib. Previously, he served as Senior Vice President of Research and Development for Onyx Pharmaceuticals from 2000 to 2006. In this role, he was responsible for the co-development of Nexavar through to FDA approval for renal cancer. Leonard received a PhD in Biochemistry from the University of Wisconsin, Madison. He is now the Chief Scientific Officer of Vivace Therapeutics, an oncology-focused portfolio-based drug discovery and development company.