Marshall Rosier, MS, is a consultant and trainer specializing in co-occurring mental health and substance use disorders. Marshall graduated from Yale University with a Masters of Science degree in Social Psychology, with a specialty in social cognition, stigma, self-esteem and group membership. Marshall has been in the field for over ten years and received his early training at the Haight Ashbury Free Clinics in San Francisco, California. He is currently the dual diagnosis counselor at Connecticut Counseling Centers, Inc – Waterbury Clinic where he specializes in the assessment and treatment of people with co-occurring mental health and substance use disorders. Marshall has a private practice consulting and training firm and has conducted training for agencies such as the State of Connecticut -Department of Mental Health and Addiction Services. Most recently, Marshall has been working as a consultant for the Addiction Technology Transfer Center – New England as a Technology Transfer Specialist providing technical assistance and consultation around using the technology transfer process in implementing evidence-based practices at agencies through out Connecticut.

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