Leadership Team


John Isham
Founder & CEO

John Isham founded RadiaDyne® in 2007 and is responsible for establishing RadiaDyne’s brand in the radiation oncology space, developing a robust and differentiated IP portfolio while delivering five FDA cleared class II medical devices to market. John’s career in the medical device industry spans 17 years and includes a remarkable track record of results in sales, executive management, R&D, Product Development and business leadership within early stage and mid-cap medical device companies. In addition, John has earned multiple patents and patents pending. He earned his B.B.A. with a focus in marketing from Texas Tech University. John is proud to actively support many Veterans and child advocacy charity's core missions.

Bret Boudousquie

Bret Boudousquie joined RadiaDyne® in July 2015 and is responsible for general management and commercial operations of RadiaDyne. Bret has been instrumental in developing RadiaDyne’s commercial team, systems and processes for scale up. Bret’s career in the medical device industry spans 19 years and includes a track record of exceptional results in sales, training, professional education, marketing and sales management in early stage growth companies and Johnson & Johnson. His focus prior to RadiaDyne has been surgical and implantable medical devices for orthopedics, spine and general surgery. He earned his B.S. in Business Administration, with a concentration in Finance, from the University of North Carolina at Wilmington.

Steve Gelmine
Vice President, Sales

Steve Gelmine joined RadiaDyne® in October 2015. His responsibilities include product launch, sales and sales training, professional education and marketing of the game changing OARtrac dosimetry platform. Steve’s leadership has been instrumental in driving RadiaDyne’s business growth since joining the company. Steve’s track record of exceptional performance in the medical device industry spans 26 years with progressive responsibility including sales, sales planning, sales training, professional education, product marketing, research and development, and executive sales management, primarily with the surgical device division of Johnson & Johnson. He earned his B.S. in Pre Law-Criminology, from Florida State University, where he was a 4 year varsity letterman in baseball. Mr. Gelmine was twice drafted in the Major League baseball draft; by the Cleveland Indians out of High School and the Houston Astros after college where he played professional baseball.