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.

Garth M. Nobis
Vice President of Regulatory Affairs and Quality Assurance

Garth Nobis brings to ViewRay a proven track record in quality assurance and regulatory affairs. He achieved a wide range of U.S. and international regulatory approvals, in addition to establishing robust quality systems for medical device companies such as Becton Dickinson, Guidant, and several start-ups. Nobis holds an MBA from the University of Dayton.

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.

Gopinath Kuduvalli, PhD 
Vice President of Engineering

A seasoned technology executive, Gopinath Kuduvalli has more than 20 years experience in product development for both the medical device and aerospace industries. His background includes a variety of leadership positions, most recently at Accuray, where he oversaw the engineering and development of its product suite. Kuduvalli holds over 30 U.S. patents in the field of radiation therapy.

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.

ViewRay leadership

ViewRay has attracted a highly skilled management team and advisory boards with deep experience in radiation therapy technology and the medical device business.