Management Team


Guy Messer, MBA, Chief Executive Officer and Owner 
Guy Messer’s experience and expertise in the medical field spans more than 30 years. Prior to founding TMI, he was Regional Sales Manager for a leading PET imaging systems manufacturer. Messer has been instrumental in developing imaging centers throughout the US and internationally. He has served in clinical, commercial and educational capacities within the nuclear medicine/PET industry for more than two decades, including an adjunct faculty position in nuclear medicine technology at George Washington University. Messer holds a MBA and has undergraduate degrees in health care management and nuclear medicine technology. An experienced nuclear medicine technologist and member of the Academy of Molecular Imaging, Messer served in the US Navy for six years and was a senior instructor in the Navy’s clinical nuclear medicine school.  Prior to his current role Messer served as Chief Financial Officer.