Dennis has an Associate of of Science degree from Foothill College Los Altos Hills CA. He has been a Staff Radiographer at the Community Hospital of the Monterey Penisula (CHOMP) since 1990 and a Clinical Instructor at CHOMP since 2004.

Dennis was a Clinical Instructor at Cabrillo college from 1991 – 2014. He has delivered continuing education seminars for the Medical Technology Management Institute (MTMI) for medical imaging professionals since 2004 and has been leading education seminars and training since 1994.