This is a website for healthcare professionals.
Leadership and Board of Directors











Dr. Ming-Chou Lee has served as Chief Technology Officer since August 2021. Dr. Lee has extensive experience in IVD and CLIA LDT product development. He has successfully led the development of numerous FDA cleared/CE marked diagnostic products currently on the market. Prior to joining Exagen, Dr. Lee served as VP of Product Development at PrimeraDx of Qiagen, MDx Health, and Metabiomics, as Molecular R&D Director at Focus Diagnostics of Quest Diagnostics and Sr. Director of Assay Development at ArcherDx. Dr. Lee received his Ph.D. from the University of Alabama in Birmingham and did his post-doctoral training at SmithKline & French.






Ron Rocca
President & CEO
Fortunato Ron Rocca has served as our President and Chief Executive Officer and as a member of our board of directors since December 2011. From 2005 to October 2011,...



Dr. Thierry Dervieux
Chief Scientific Officer, Medical Director, New York
Thierry Dervieux, Ph.D. has served as our Chief Scientific Officer and Medical Laboratory Director since October 2010. Dr. Dervieux has nearly 20 years of experience...



Kamal Adawi
Chief Financial Officer
Kamal Adawi has served as our Chief Financial Officer since June 2017. Kamal previously held the positions of Chief Financial Officer, Corporate Secretary and...



Arthur Weinstein, M.D.
Chief Medical Officer
Arthur Weinstein, M.D. has served as our Chief Medical Officer since October 2017 and has been a member of our board of directors since December 2013. Dr. Weinstein...


Claudia Ibarra
Senior Vice President Laboratory Operations
Claudia Ibarra has served as our Senior Vice President, Laboratory Operations since January 2017, after being our Vice President, Laboratory Operations from 2014. She...



Mark Hazeltine
Vice President of Finance
Mark Hazeltine has served as our Vice President of Finance since June 2017. Mr. Hazeltine served as Exagen’s Sr. Director of Financial Planning and Analysis...


Brian Littlefield
Vice President, Information Services
Brian Littlefield has served as our Vice President, Information Services since April 2014. Prior to joining Exagen, Mr. Littlefield served as the Senior Director,...


Brian McEvilly
Vice President of Marketing
Brian McEvilly has served as our Vice President of Marketing since February 2016. Brian joined us with nearly 20 years of medical marketing experience including his...


Tami Powell (York)
Vice President, Corporate Payer and Reimbursement Strategy
Tami Powell has served as our Vice President of Corporate Payer and Reimbursement Strategy since September 2017, after being our Senior Director, Corporate Payer...



John Wegener
Vice President, Sales & Managed Markets
John Wegener has served as our Vice President, Sales and Managed Markets since November 2013. Prior to joining Exagen, Mr. Wegener served in various capacities with...
Board of Directors
Ana Hooker has served as the SVP, Chief Scientific Officer of Exact Sciences Corporation, a molecular diagnostics company, since July 2015. Ms. Hooker joined Exact Sciences Corporation in March 2013 with a focus on opening a new clinical laboratory in preparation for the launch of Cologuard. Prior to joining Exact Sciences Corporation, Ms. Hooker was at ARUP Laboratories for 15 years. While at ARUP Laboratories, Ms. Hooker held positions of increasing responsibility, including Group Manager for the Divisions of Oncology and Genetics, Technical Supervisor of the University of Utah Hospital Clinical Laboratories, Vice President, Division Manager for genetics and Senior Vice President, Division Manager for anatomic pathology, oncology and genetics. Ms. Hooker currently serves on the boards of Big Brothers, Big Sisters of Dane County and the Overture Center for the Arts. Ms. Hooker is also a member of the Latino Professional Association (LPA), Clinical Laboratory Management Association (CLMA), Association of Molecular Pathology (AMP), and the American Society of Clinical Laboratory Science (ASCLS). Ms. Hooker earned a Bachelor of Science from Kansas State University, a medical technologist degree from Hays Pathology Laboratories, and an M.B.A. from Westminster College.
Mr. Stokes has served as the Chief Financial Officer of Castle Biosciences, Inc., a skin cancer diagnostics company, since December 2017. From January 2017 to December 2017, Mr. Stokes served as Chief Financial Officer of Hammock Pharmaceuticals, a specialty pharmaceutical company focused on the development and commercialization of women's health and urology products. From May 2011 to December 2016, Mr. Stokes served as a Managing Director of Leerink Swann (now SVB Leerink). Mr. Stokes also held positions as a Managing Director at Robert W. Baird & Co. Incorporated and Wachovia Securities, LLC. While at SVB Leerink and Robert W. Baird & Co., Mr. Stokes led life sciences, tools and diagnostics sector investment banking efforts and managed financings and mergers and acquisitions transactions. Mr. Stokes obtained a Bachelor of Science in Business Administration, Master of Business Administration and Doctor of Jurisprudence, all from the University of North Carolina at Chapel Hill.