ViewRay leaders combine expertise in business and medical technology

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.

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 MRIdian 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.

Doug Keare
Chief Operating Officer
Doug brings over twenty years of technology and medical device executive experience, including roles at Accuray and ADAC Labs. He has led successful customer-focused operations at numerous companies and as VP of Quality at ADAC Labs, led the company to win the Malcolm Baldrige National Quality Award. He received a BA from Dartmouth College and an MBA from Stanford University’s Graduate School of Business.

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  
David Chandler has served as our Chief Financial Officer (CFO) since November 2010. Mr. Chandler brings extensive experience in finance, operations, strategic planning, investor relations and accounting, including experience at one of the Big Four accounting firms. Before joining ViewRay, Mr. Chandler served as Chief Financial Officer in three other companies: vcfo Holdings, Inc., (2007 to 2010); Straitshot Communications, Inc., where he also he served as Chief Operating Officer (2003 to 2007); and Stellar One Corporation (1998 to 2003). Before that, Mr. Chandler held a variety of financing and accounting management roles, including Business Assurance Manager with PricewaterhouseCoopers LLP. Mr. Chandler received a B.A. in Business from the University of Washington, Michael G. Foster School of Business. 

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.

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