He is currently an Associate Faculty member at the Michigan School of Professional Psychology, teaching in Professional Ethics and other clinical topics. He is also an adjunct faculty member in the graduate counseling program for Sienna Heights University and has also served as an adjunct faculty member at Oakland Community College since 2007. Dr. Brennan is a practicing clinician at The Relationship Institute in Royal Oak where he specializes in treating couples, as well as individuals struggling in the areas of substance abuse and anger.