Our team is led by seasoned industry veterans who are dedicated to improving the lives of patients.
William R. Ringo
Interim Chief Executive Officer and Chairman of the Board
Mr. Ringo has served as our iInterim Chief Executive Officer since September 2019, Chairman of the Board since January 2019, and a member of our Board since October 2014. From June 2010 until December 2016, Mr. Ringo served as a senior advisor to Barclays Healthcare Group. From April 2008 until his retirement in April 2010, Mr. Ringo was Senior Vice President of Business Development, Strategy and Innovation at Pfizer Inc., a public pharmaceutical company, and was responsible for guiding Pfizer’s overall strategic planning and business development activities. Prior to joining Pfizer, Mr. Ringo served as an executive in residence at Warburg Pincus and Sofinnova Ventures. From August 2004 to April 2006, Mr. Ringo served as President and Chief Executive Officer of Abgenix, Inc., a biotechnology company acquired by Amgen, Inc. Prior to Abgenix, Mr. Ringo served for 28 years at Eli Lilly and Company in numerous executive roles, including Product Group President for Oncology and Critical Care, President of Internal Medicine Products, President of the Infectious Diseases Business Unit and Vice President of Sales and Marketing for U.S. Pharmaceuticals. Following Mr. Ringo’s retirement from Eli Lilly in 2001, Mr. Ringo served on various boards of directors, including InterMune, Inc. where he served as the non-executive chairman of the board of directors after serving as interim Chief Executive Officer from June 2003 to September 2003. Mr. Ringo currently serves on the boards of directors of Assembly Biosciences, Inc., Dermira, Inc., and Immune Design Corp., each of which is a public biotechnology company. Mr. Ringo was previously a member of the board of directors of Immune Design Corp., Onyx Pharmaceuticals, Inc., Mirati Therapeutics, Inc., and Sangamo Therapeutics, Inc., each of which was a public company during Mr. Ringo’s service as a director. Mr. Ringo received a B.S. in business administration and an M.B.A. from the University of Dayton.
Chief Strategy Officer and Secretary
Mr. Sarena has served as our Chief Strategy Officer since September 2016 and as Secretary since December 2010. He also served as our Executive Vice President from August 2015 to September 2016, General Counsel from December 2010 to September 2016, Senior Vice President from January 2013 to August 2015 and as Vice President from December 2010 to January 2013. From December 2008 to July 2010, Mr. Sarena served as Vice President, General Counsel and Secretary of Facet Biotech Corporation, a public biotechnology company that was spun off from PDL BioPharma, Inc. in December 2008 and that was later acquired by Abbott Laboratories in April 2010. From April 2006 to December 2008, Mr. Sarena served at PDL BioPharma, Inc. in positions of increasing responsibility, most recently as Vice President, General Counsel and Secretary from June 2008 to December 2008. Prior to April 2006, Mr. Sarena served as an associate at Bingham McCutchen LLP where he represented public and private life science and high tech clients primarily in merger and acquisition transactions, corporate and securities law matters and equity financing transactions. Mr. Sarena received a B.S. in Finance from San Francisco State University and a J.D. from the University of California, Berkeley.
Helen Collins, M.D.
Executive Vice President and Chief Medical Officer
Dr. Collins has served as our Executive Vice President since August 2019 and Chief Medical Officer since March 2017. She also served as Senior Vice President from March 2017 to August 2019 and Vice President of Clinical Development from June 2016 to March 2017. From June 2013 to June 2016, Dr. Collins held positions of increasing responsibility at Gilead Sciences, Inc., most recently as Program and Clinical Lead for Gilead’s GS-5829 (BET inhibitor) and GS-4059 (BTK inhibitor) programs. From November 2009 to May 2013, Dr. Collins held positions of increasing responsibility at Amgen Inc., most recently as Global Lead, Oncology Biosimiliars. Prior to joining Amgen, Dr. Collins practiced as a medical oncologist and hematologist for 12 years at Redwood Regional Medical Group (RRMG) and served as President of RRMG from 2006 to 2009. In 2005, Dr. Collins co-founded the non-profit North Bay Cancer Alliance (NBCA), whose mission is to increase local access to education and cancer care in counties in the northern San Francisco Bay Area. Dr. Collins received an A.B. in Chemistry from Bryn Mawr College and an M.D. from Johns Hopkins University School of Medicine. Dr. Collins completed her residency in internal medicine at Johns Hopkins Hospital and completed her fellowship at Stanford University School of Medicine, where she concentrated in gastrointestinal cancer. Dr. Collins is board certified in both oncology and internal medicine.
Nallakkan S. Arvindan, Ph.D.
Senior Vice President, Strategic Technology Operations
Dr. Arvindan has served as our Senior Vice President, Strategic Technology Operations since February 2018 and served in positions of increasing responsibility, most recently as our Vice President, Strategic Technology Operations, from February 2012 to February 2018, and from December 2009 to August 2011. From September 2011 to February 2012, Dr. Arvindan served as Senior Technology-Engineering Manager, Strategic Technical Operations at IDEXX Laboratories, Inc. From July 2003 to December 2009, Dr. Arvindan served in positions of increasing responsibility, most recently as Engineering Manager, at Symyx Technologies, Inc, which was acquired by Accelrys, Inc. in 2010. Dr. Arvindan received an M.B.A. from the University of California, Berkeley, a Ph.D. in Chemical Engineering and Nanotechnology from the University of Washington, Seattle, and a B.Tech in Chemical and Electrochemical Engineering from the Central Electro-Chemical Research Institute in Karaikudi, India.
Executive Vice President and Chief Financial Officer
Mr. Smith has served as our Executive Vice President and Chief Financial Officer since November 2018. From May 2012 until its acquisition by Thermo Fisher Scientific Inc. in March 2018, Mr. Smith served as Chief Operating Officer of IntegenX, Inc., a biotechnology company. From December 2006 to July 2011, Mr. Smith served as Executive Vice President and Chief Financial Officer of Thoratec Corporation, a public medical device company that was later acquired by St. Jude Medical. From 1999 until its acquisition by Novartis International AG in 2006, Mr. Smith served in positions of increasing responsibility at Chiron Corporation, a public biotechnology company, most recently as Vice President and Chief Financial Officer. From 1997 until its acquisition by Corixa Corporation in 1999, Mr. Smith served as Vice President, Finance and Chief Financial Officer of Anergen, Inc., a public biotechnology company. Prior to Anergen, Mr. Smith served in various roles at Genentech, Inc., IBM Corporation and Syntex Corporation. Mr. Smith currently serves as a member of the board of directors and chair of the audit and finance committees of Codexis, Inc., a public biotechnology company. Mr. Smith previously served as a member of the board of directors of OncoGenex Pharmaceuticals Inc., a public biotechnology company. Mr. Smith received an M.B.A., Finance from Golden Gate University and a B.A. in Economics and History from Willamette University.