Management Team

John brings more than 20 years of experience providing strategic oversight to deliver operational excellence and outstanding performance. Most recently, John served as Vice President and General Manager of the Aortic business at Medtronic. He also served in key leadership roles for Medtronic’s Cardiovascular and Diabetes Groups, including Vice President of the Americas region for the Insulin Pump and Continuous Glucose Monitoring business unit and Vice President for Asia Pacific.

Nicky served as vice president of legal operations and assistant general counsel for Intuitive Surgical in Sunnyvale, Calif. She also served as the vice president of intellectual property for Illumina, Inc., in San Diego. Espinosa also spent more than 20 years in private practice as a litigation partner in the Silicon Valley offices of three major national law firms: Brobeck, Phleger & Harrison LLP, Dewey Ballantine LLP, and Dechert LLP. While in private practice, she advised and represented a variety of emerging growth and publicly held life science and technology companies.

Joe brings 15 years of experience in sales, marketing and general management across capital, information technology and device solutions in Cardiology, Radiology and Surgery.

Kathleen is an accomplished Inside Sales and Customer Care executive with more than 15 years of experience. Her expertise spans driving process improvement and operational excellence, utilizing metrics/analytics to deliver results, and leading organizations through large-scale expansion. Most recently, Kathleen was Senior Director, Inside Sales Initiatives at Alto Pharmacy, a telehealth pharmacy startup. She has held operational leadership roles of increasing responsibility at Cardinal Health, Medtronic, W.W. Grainger and Deloitte Consulting.

Charles is a Founder, Chief Scientific Officer, and Member of the Board of Directors of HeartFlow Inc. Previously, he was an Associate professor in the Departments of Bioengineering and Surgery at Stanford University with courtesy faculty appointments in the Departments of Mechanical Engineering and Radiology. He is also currently an Adjunct Professor of Computational Engineering and Sciences at the University of Texas, Austin and a Part-time Professor of Biomedical Engineering at the Technical University of Eindhoven. He is internationally recognized for his pioneering work over the last 30 years in combining computer simulation methods with medical imaging data for patient-specific modeling of blood flow to aid in the diagnosis and treatment of cardiovascular disease. Charles has published over 400 peer-reviewed journal and conference papers and has over 300 issued patents worldwide.

Campbell brings a wealth of experience to HeartFlow, where he serves as the Chief Medical Officer. Prior to joining HeartFlow, he was the Chief Scientific Officer and Global Head of Research and Development at Cordis Corporation, Johnson & Johnson, where he was responsible for leading investments and research in cardiovascular devices. Prior to Cordis, he was Associate Professor of Medicine at Harvard Medical School and the Harvard-M.I.T. Division of Health Sciences and Technology, and Director of the Cardiac Catheterization and Experimental Cardiovascular Interventional Laboratories at Brigham and Women’s Hospital. He served as Principal Investigator for numerous interventional cardiology device, diagnostic, and pharmacology trials, is the author of numerous journal articles, chapters, and books in the area of coronary artery and other cardiovascular diseases, and was the recipient of research grant awards from the NIH and AHA.

Stephen has extensive experience across marketing, clinical and regulatory and joined HeartFlow in 2021 as the SVP, Marketing, Customer Success and International Sales.

Most recently, Stephen worked at Medtronic in several critical roles including Vice President of Marketing for the Aortic business, in addition to leading the Peripheral business in EMEA where he successfully drove adoption of the IN.PACT Admiral drug-coated balloon as the standard-of-care for the treatment of peripheral arterial disease. Stephen was also an internal medicine resident at the New York-Presbyterian Hospital and began his career at Lehman Brothers as an investment banker.

Vikram spent more than 13 years in roles of increasing responsibility across strategy, business development, global marketing, regulatory affairs, and clinical affairs. Most recently, Vikram worked at Verily Life Sciences, where he was the Business Development lead for the medical device portfolio, and Medtronic, where he spent many years leading upstream marketing, business development and strategy.