Dennis has been teaching at �Թϱ��� for over 18 years. He has held roles as an adjunct professor as well as the director of CASAC education, assisting students with certificate completion to obtain they CASAC-T. 

Dennis has been in the mental health field for 40 years, both on the administration side as well as clinical. He also currently work at AJS Wellness Center in New Rochelle for the last 14 years.