Board of Directors

Arthur T. Sands, M.D., Ph.D.

Chief Executive Officer and Board Director

Arthur T. Sands, M.D., Ph.D., has served as the Chief Executive Officer at Nurix and a member of the company’s board of directors since September 2014. Prior to joining Nurix, Dr. Sands was the co-founder and served as President, Chief Executive Officer, and as a member of the board of directors of Lexicon Pharmaceuticals, Inc., a biopharmaceutical company focused on target validation and pharmaceutical development, from 1995 to July 2014. Before founding Lexicon Pharmaceuticals, Dr. Sands was an American Cancer Society postdoctoral fellow in the Department of Human and Molecular Genetics at Baylor College of Medicine. Dr. Sands holds a B.A. in Economics and Political Science from Yale University and an M.D. and a Ph.D. in Cell Biology from Baylor College of Medicine.

David Lacey, M.D.


David Lacey, M.D., has served as a member of our board of directors since April 2016, and as Chairman of our board of directors since August 2019. Dr. Lacey joined Amgen in 1994 where, during the last five years of his tenure, he was the Head of Discovery Research, and managed more than 1200 employees. At any given time, Dr. Lacey oversaw over 100 actively-managed preclinical projects across four therapeutic areas: hematology/oncology, inflammation, metabolic disorders and neuroscience. Scientifically, he played a fundamental role in the discovery of the OPG/RANKL/RANK pathway at Amgen, which led to the development of the anti-RANKL human mAb denosumab. Following his retirement in 2011, he has continued to be active in the biopharmaceutical industry. His current activities include advising academic institutions, biotechnology companies, and venture capital firms. Dr. Lacey received both his undergraduate and medical degrees from the University of Colorado. Following the completion of his training, he served on the faculty at Washington University in St. Louis.

Leon Chen, Ph.D.

Board Director

Leon Chen, Ph.D., has served as a member of our board of directors since January 2020. Dr. Chen has been a Partner at The Column Group, a healthcare venture capital firm, since October 2019. Previously, he was a Venture Partner at OrbiMed focusing on company creation and investing in early stage biotech companies. In this capacity he took on interim management roles at E-Scape Bio, TranscripTx, and Adicet. He also served on the board of directors of Pionyr Immunotherapeutics and Logic Bio. Prior to that Dr. Chen was a Partner at Skyline Ventures and an entrepreneur in residence at Venrock. Dr. Chen started his career in 2002 as a founder of KAI Pharmaceuticals, which was acquired by Amgen in 2012 and led to the approval of Parsabiv in the US, Europe, and Japan. Dr. Chen holds a B.A. in Molecular and Cell Biology from the University of California, Berkeley, a Ph.D. in Molecular Pharmacology from Stanford School of Medicine, and an M.B.A. from Stanford Graduate School of Business.

Julia Gregory

Board Director

Julia P. Gregory has served as a member of our board of directors since August 2019. Ms. Gregory formerly served as president and CEO of Five Prime Therapeutics, CEO of ContraFect Corporation, and as executive vice president, corporate development, and CFO of Lexicon Pharmaceuticals. Ms. Gregory currently serves as chair and CEO of biotechnology financial and management advisory firm, Isometry Advisors, Inc. and senior advisor (Managing Director) to M.M. Dillon & Co., Inc. Ms. Gregory also has twenty years of investment banking experience, starting at Dillon, Read & Co. and subsequently at Punk, Ziegel & Company, where she served as the head of investment banking and head of its life sciences practice. Ms. Gregory served as executive chair of Cavion, Inc. until its sale to Jazz Pharmaceuticals and currently serves on the board of directors at Biohaven Pharmaceuticals, Cell Medica, Iconic Therapeutics, IMV, Inc., and the Sosei Group Corporation. Ms. Gregory obtained an M.B.A. from the Wharton School at the University of Pennsylvania and earned her B.A. in International Affairs and International Economics at the George Washington University.

Lori A. Kunkel, M.D.

Board Director

Lori A. Kunkel, M.D., has served as a member of our board of directors since July 2019. Dr. Kunkel holds more than 20 years of experience in oncology and immunology drug development. She joined Nurix Therapeutics after serving on the board of directors of Loxo Oncology, Inc. until its sale to Eli Lilly. She currently serves on the board of directors of Curis, Inc., Maverick Therapeutics, Inc., and Tocagen, Inc. She previously held positions of acting chief medical officer at Loxo Oncology, chief medical officer at Pharmacyclics, LLC, ACT, Syndax, and Proteolix, Inc. as well as in senior clinical roles at Chiron and Genentech, Inc. Prior to her career in biotechnology, Dr. Kunkel spent approximately 10 years in academic medicine and served as a faculty member at the Bone Marrow Transplant Unit in the Division of Hematology/Oncology at University of California, Los Angeles. She has held board certifications in hematology and oncology and holds a B.A. in biology from the University of California, San Diego and an M.D. from the University of Southern California.

Robert Tjian, Ph.D.

Board Director

Robert Tjian, Ph.D., has served as a member of our board of directors since November 2016. Dr. Tjian joined The Column Group as a Discovery Partner in September 2016. Prior to that he served as President of the Howard Hughes Medical Institute from 2009-2016. Dr. Tjian discovered the first transcription factors, human proteins, that bind to specific sections of DNA and play a critical role in regulating how genetic information is expressed into the thousands of biomolecules that keep cells, tissues, and organisms alive. Dr. Tjian’s laboratory has focused on disruptions in the process of transcription that cause diseases such as cancer, metabolic syndromes, and neuro-degenerative diseases. Dr. Tjian joined the University of California, Berkeley faculty in 1979, where he assumed several leadership roles, including Director of the Berkeley Stem Cell Center, Faculty Director of the Li Ka Shing Center for Biomedical and Health Sciences, and Head of the Siebel Stem Initiative. He currently serves as scientific advisor to the Chan Zuckerberg Initiative and the BioHub. Dr. Tjian is a member of the National Academy of Sciences and has received numerous awards including the Alfred P. Sloan Prize and the Louisa Gross Horwitz Prize.

Jeff Tong, Ph.D.

Board Director

Jeffrey Tong, Ph.D., has served as a member of our board of directors since February 2018. Dr. Tong is a partner with Third Rock Ventures where he focuses on drug discovery and development across the portfolio. He brings significant operational experience in building and growing early-stage biotechnology companies. Prior to joining Third Rock, Dr. Tong was Executive Chairman of the Board of Delinia, a company developing novel therapeutics for the treatment of autoimmune diseases. From 2010 to 2015, he was the President and Chief Executive Officer of Nora Therapeutics. Prior to that, he was a member of the founding management team at Infinity Pharmaceuticals where he led its corporate as well as product development activities. Over the course of his career, Dr. Tong has raised significant capital from both equity markets and pharma partnerships, led teams from preclinical through Phase 3 development, and developed integrated science/business strategies for building innovative biotechnology companies. Earlier in his career, Dr. Tong worked at McKinsey & Co. and was a founding researcher at the Harvard Bauer Center for Genomics Research. Dr. Tong received his educational training at the interface of molecular biology, organic chemistry, and medicine and holds A.B. and M.M.S. degrees from Harvard College and Harvard Medical School, respectively, as well as A.M. and Ph.D. degrees from Harvard University.