Joseph K. Jachinowski

Varian Medical Systems, Inc. engages in the manufacture of medical devices and software for treating cancer and other medical conditions. It operates through the Oncology Systems and Proton Solutions segments. The Oncology Systems segment designs, manufactures, sells, and services hardware and software products for treating cancer with conventional radiation therapy, and advanced treatments. The Proton Solutions segment delivers proton therapy, a form of external beam radiotherapy using proton beams for the treatment of cancer. The company was founded by William Hansen, Edward Ginzton, Russell Varian, and Sigurd Varian in 1948 and is headquartered in Palo Alto, CA.

IMPAC Medical Systems, Inc. develops integrated software for oncology. It provides integrated clinical and administrative management systems for cancer specialists. The company was founded by Joseph K. Jachinowski, James P. Hoey and David A. Auerbach in January 1990 and is headquartered in Sunnyvale, CA.

Mevion Medical Systems, Inc. provides proton therapy systems for cancer centers, clinicians and patients worldwide. Its MEVION S250 Series is designed to deliver proton therapy treatments, optimizing both the outcomes and the economics of proton therapy. Its products include Mevion S250i with hyperscan and Mevion 250mx. The company was founded by Kenneth A. Gall in 2004 and is headquartered in Littleton, MA.

Part of Elekta AB, Elekta Holdings US, Inc. is a company that provides secure software for robust data security and multi-layer threat protection. The company is based in Norcross, GA, and the CEO of the company is James P. Hoey. The company helps clinicians treat cancer and brain disorders through precision radiation medicine, targeting the tumor and protecting the patient. Elekta has been providing innovative technologies to improve cancer care across the globe for 50 years. The company also offers precise and personalized veterinary radiation therapy using linear accelerators for cats, dogs, and other animals.

Radiation Oncology Institute operates as a non profit foundation working to heighten the critical role of radiation therapy in the treatment of cancer through research and education. The firm's mission is to support research and education about the life-saving and quality-of-life benefits of radiation therapy. The company was founded in 2206 and is headquartered in Arlington, VA.