One hundred rehabilitation counselors in California reported that about 90% of consumers with whom they worked with had substance abuse and cooccurring issues, yet about half rated their graduate training in substance abuse treatment and assessment as poor and their practices as marginally proficient. The correlation analysis revealed that counselors who have no formal training in substance abuse perceived a very poor adequacy of their graduate training and believed they were not at all competent in providing services. A change of curriculum requirement, continuing education opportunities, and professional training Web sites were emphasized as an outlet to improve rehabilitation counselors' competency to serve consumers with substance abuse issues. (Contains 4 tables.)