ViewRay leaders combine expertise in business and medical technology

Executive team

Chris A. Raanes
President and CEO
With extensive experience in the medical device field, Chris Raanes has held executive positions at companies such as Accuray and PerkinElmer Optoelectronics. As executive vice president and chief operating officer at Accuray, Raanes was instrumental in transforming the company from a start-up niche player into the number three vendor in the radiation therapy industry. He holds an MSEE from the Massachusetts Institute of Technology.

James F. Dempsey, PhD
Chief Scientific Officer
Company founder and inventor of the ViewRay technology, Jim Dempsey guides the scientific and technical aspects of the ViewRay system’s development. Dempsey holds a PhD in nuclear chemistry from Washington University. He is a board-certified medical physicist and former associate professor of radiation oncology at the University of Florida.

Prabhakar Tripuraneni, MD, FACR, FASTRO
Chief Medical Officer
Currently the head of radiation oncology at Scripps Green Hospital in La Jolla, California, Prabhakar Tripuraneni is a pioneer in coronary vascular brachytherapy. A graduate of Guntur Medical College in South India, he is the former president of ASTRO, the American Society for Radiation Oncology.

David Chandler
Chief Financial Officer 
Veteran CFO David Chandler has nearly three decades of experience in finance, strategic planning, mergers and acquisitions, investor relations, and accounting. Working with an array of businesses, Chandler has raised more than $100 million in private debt and equity capital, and $80 million in private M&A.

Robert Bea 
Senior Vice President of Regulatory and Quality,
Chief Compliance Officer
With more than 30 years of experience in quality management, compliance, and regulatory affairs, Robert Bea has played an integral role in establishing quality management systems in companies large and small. Bea previously served as a corporate vice president for Siemens Medical Solutions USA.

Michael Brandt 
Senior Vice President of Sales
A veteran of the radiation therapy and medical imaging industries, Brandt leads ViewRay’s worldwide sales and marketing programs. Prior to joining ViewRay, Brandt served as general manager of Accuray’s Americas and Europe, Middle East, India, and Africa (EMEIA) divisions, and held a series of international management positions at Philips Medical Systems.

Stephen J. Strunk
Vice President of Manufacturing
An operations expert, Stephen Strunk specializes in the development and manufacturing of complex technologies. With more than two decades of experience in the medical device and high-tech industries, Strunk has held executive positions at companies such as Accuray, PerkinElmer, and Teledyne Dalsa.