Leadership

Stephen Brady

Chief Executive Officer

Mr. Brady has been Tempest’s Chief Executive Officer since June 2021, first joining the company in September 2019 as president and chief operating officer. Most recently, he served as executive vice president, strategy and finance at Immune Design, a biopharmaceutical company sold to Merck in 2019. At Immune Design, Mr. Brady led strategy, corporate development, finance and investor and public relations, as well as other general and administrative functions, and was instrumental in the company’s successful IPO, financings and eventual sale. Prior to Immune Design, he held roles of increasing responsibility in multiple biopharmaceutical companies, including as vice president of corporate development at Proteolix, where he had primary responsibility for the company’s business development activities and sale to Onyx Pharmaceuticals. Mr. Brady also serves on the Board of Directors of Atreca, Inc.

Tom Dubensky, Ph.D.

President

Dr. Dubensky was the founding CEO of Tempest, joining the Company in 2017. He brings significant expertise in the discovery, development and translation of novel small molecule-, biologic- and vector-based cancer therapies, having advanced several first-in-human drug candidates. Dr. Dubensky previously held roles leading discovery biology, development and clinical translation in cancer immunotherapy and infectious disease indications at multiple biotech companies, including Viagene, Chiron, Onyx, Cerus and Immune Design. He has an extensive publication and patent record. Dr. Dubensky received his BA in Bacteriology and Immunology from the University of California, Berkeley, his PhD at the University of Colorado Health Sciences Center, conducted his post-doctoral studies at Harvard Medical School in the Department of Pathology and received executive training at the University of California, San Diego, Executive Program for Scientists and Engineers.

Sam Whiting, M.D., Ph.D.

Chief Medical Officer

Dr. Whiting joined Tempest as executive vice president and chief medical officer in November 2020. Prior to joining Tempest, Dr. Whiting served as senior vice president of clinical development at Calithera Biosciences, a clinical-stage biotech company focused on developing treatments for cancer and other life-threatening diseases. Before Calithera, Dr. Whiting served as vice president of research and clinical development at Gradalis and worked in development of small molecule targeted and immune-oncology agents at VentiRx Pharmaceuticals and Oncothyreon. Prior to joining industry, Dr. Whiting served as assistant professor of medical oncology at the University of Washington, assistant member of clinical research at the Fred Hutchinson Cancer Research Center, and clinical head of gastrointestinal oncology at the Seattle Cancer Care Alliance. Dr. Whiting completed fellowship training in medical oncology at the Fred Hutchinson Cancer Research Center. His training in internal medicine was through the ABIM Research Pathway at the University of Washington. Dr. Whiting received his B.S. with Honors in Chemistry from Lewis and Clark College and his M.D. and Ph.D. in the Medical Scientist Training Program at the University of Washington.

Sharon Sakai, Ph.D.

Senior Vice President, Regulatory and Quality

Dr. Sakai has held various regulatory positions for over twenty years at several Bay Area biotechnology companies including Avigen, Onyx Pharmaceuticals, and Peninsula Pharmaceuticals. She has extensive experience ranging from numerous IND submissions through NDA and BLA preparation and approval. She joined Transcept Pharmaceuticals in 2005, building the Regulatory department and ultimately rising to Vice President of Regulatory and Quality, leading the company to an NDA approval in 2011. From 2013 to 2015, Dr. Sakai served as Vice President of Regulatory Affairs at Adamas Pharmaceuticals. She has consulted for several Bay Area biotech and pharmaceutical companies across multiple therapeutic areas including Neurology, Gastroenterology, Oncology, and Rare Diseases. Client companies have included Aduro, SillaJen, and BioMarin. Dr. Sakai’s early career included Cell Biology research at the NIH as a Senior Staff Fellow and managing virus production facilities at early stage gene therapy companies. Dr. Sakai received a BS in Microbiology from Cornell University and a Ph.D. in Cell Biology from the University of California at Berkeley.

Anne Moon, Ph.D.

Senior Vice President, Head of Project Team Leadership, Project Management and Portfolio Management

Dr. Moon joins Tempest with over 20 years of industry experience in oncology drug development and brings expertise in leading projects, development science functions and project management. Most recently she was VP, Project Management, at Aduro Biotech where she implemented procedures to support corporate growth and portfolio expansion. Dr. Moon also served as Project Team Leader for Aduro’s Ovarian and Gastric cancer programs. Prior to Aduro, Dr. Moon was a founding member of Jennerex Biotherapeutics (acquired by SillaJen in 2014) where she served as VP, Product Development, with responsibilities that included preclinical development, clinical bioanalytics, and next-generation oncolytic virus research, in addition to leading project management and managing intellectual property filings. Prior to Jennerex, Dr. Moon established the cell-based screening program and managed intellectual property filings at Cytokinetics. Dr. Moon completed post-doctoral training at Onyx Pharmaceuticals within the small molecule therapeutics program targeting small GTPases. She received her Ph.D. in Molecular & Cell Biology from the University of California, Berkeley and an AB in Biology from Harvard University.

Nicholas Maestas

Vice President, Strategy and Finance

Mr. Maestas joined Tempest as vice president, strategy and finance in July 2021. He comes to Tempest from Alector, where he served as the head of FP&A and strategic finance, where he was responsible for setting the company’s roadmap and was instrumental in building Alector's FP&A function and establishing a transformative global collaboration with GSK. Prior to Alector, Mr. Maestas was responsible for corporate and business development, FP&A, alliance management, strategic planning, and general operations such as facilities and IT at Immune Design where he played a key role in the company's eventual sale to Merck in 2019. Prior to Immune Design, he held roles of increasing responsibility at companies focused on a range of aspects of the life sciences industry, including genetic sequencing, medical devices and biotherapeutics. Mr. Maestas received a BA in Molecular and Cell Biology from the University of California at Berkeley and an MBA from The Wharton School, University of Pennsylvania.