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Substance abuse counselors (also called behavioral disorder counselors) help people who have addictions or other behavioral disorders, e.g., alcohol, drugs, gambling, substance abuse and eating disorders. They sometimes work with individuals, but more frequently work in a group setting. Counselors also run education and training programs aimed at preventing addictions.
You can find out more at the web page "Substance Abuse Online and On Campus Degree Programs", which has details of the courses, where you can take them, the career prospects, and more ...