Dr. Calvin Chao is the Senior Vice President of Medical Affairs at Tempus.  Previously, Dr. Chao spent thirteen years leading studies and education for the Oncotype DX Breast, Prostate, and Colon Cancer assays at Genomic Health, later acquired by Exact Sciences.  Prior to that role, he worked in various bio-pharmaceutical medical director positions at Onyx Pharmaceuticals, PDL BioPharma, TAP Pharmaceuticals, and SmithKline Beecham. In his early career, Dr. Chao practicedas a board-certified internist and hospitalist at Kaiser Permanente in California for ten years. He earned his MD from the University of Texas Medical Branch, completed his medical residency at Presbyterian-St. Luke’s Medical Center in Denver, Colorado, received his MBA from St. Mary’s College, California, and his BS in Chemical Engineering from University of California, Berkeley.