Counselors assist people with personal, family, educational, mental health, and career problems. Their duties vary greatly depending on their occupational specialty, which is determined by the setting in which they work and the population they serve.
Substance abuse and behavioral disorder counselors help people who have problems with alcohol, drugs, gambling, and eating disorders. They counsel individuals who are addicted to drugs, helping them to identify behaviors and problems related to their addiction. Counseling can be done on an individual basis, but is frequently done in a group setting. These counselors will often also work with family members who are affected by the addictions of their loved ones. Counselors also conduct programs aimed at preventing addictions.
Overall employment of counselors is expected to increase by 21 percent between 2006 and 2016. Employment of substance abuse and behavioral disorder counselors is expected to grow 34 percent, which is much faster than the average for all occupations. As society becomes more knowledgeable about addiction, it is increasingly common for people to seek treatment. Furthermore, drug offenders are increasingly being sent to treatment programs rather than jail.
http://www.bls.gov/oco/ocos067.htm