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Learn More About Proton Therapy
Learn More About Proton Therapy


Joseph K. Jachinowski

President, Chief Executive Officer, Director

With more than thirty years of experience in the field of oncology, Joe brings an unmatched depth of expertise and experience to our company. He has served as Mevion’s chief executive officer and member of the board of directors since 2009 and president since 2012. Since joining the company, Joe has overseen the development of industry-leading technologies and our growth into a leading global provider of proton therapy systems.

Joe cofounded IMPAC Medical Systems and served as its president and chief executive officer from 1990 through the company’s initial public offering and sale to Elekta in 2005. After the sale, Joe was an executive vice president of Elekta for four years running global R&D and North American commercial operations. Joe began his career at Varian Medical Systems, Inc., where he led the team that developed linear accelerators from 1983 to 1990.

He holds a Bachelor of Science from Ohio University and Master of Science from Washington State University.