Mark specializes in Chemical & Process (out-of-control behaviors) Addictions, Sex Addiction, Group Therapy & Other Support Groups, Same Gender and Mix Gender Couples, Adult Survivors of Childhood Trauma, Issues with Sexual Orientation & Romantic/Emotional Attraction, and Depression & Anxiety. Mark is also the Vice-President of The National Association of LGBTQ+ Addiction Professionals (NALGAP).

Specializing in anxiety, depression, sexual compulsion,sex therapy, abuse recovery, HIV/AIDS, chronic disease, relationship therapy, polyamoury/non-monogamy, and sexual orientation.