Born to George E. and June V. (Witzman) MacKinnon in Highland Park, MI.
Marries Nancy Keller-MacKinnon.
Earns a Bachelor of Science in religious education from Rochester University.
Earns a Bachelor of Science in human resources development from Oakland University.
Becomes a licensed clinical psychologist.
Achieves a Master of Arts in marriage and family therapy from Wayne State University.
Obtains a Doctor of Philosophy in clinical psychology from the University of Detroit-Mercy.
Works as a licensed clinical psychologist out of his practice, MacKinnon and Associates, through today.
Teaches as a professor of psychology at Rochester University until 2021.
Is the director of the MacKinnon Psychology and Counseling Clinic at Rochester University through today.
Serves as chair of the Department of Psychology and Behavioral Sciences at Rochester University until 2020.
Is honored as Distinguished Faculty of the Year at Rochester University.
The MacKinnon Psychology and Counseling Clinic at Rochester University is named in his honor.
Is named to Top Docs Psychologists.
Is honored as emeritus professor of psychology at Rochester University.
Receives the inaugural Faculty Excellence Award at Rochester University.