A. Thomas McLellan, Ph.D., Chief Executive Officer. Best known for his pioneering introduction of the Addiction Severity Index and Treatment Services Review in the 1980s, McLellan later conceptualized data-driven measurement of treatment effectiveness, performance-based monitoring, and analysis of the nation’s substance abuse treatment system as an “industry” beset with the same organizational, staffing and funding problems overcome in other problem-plagued industries. Through his research and extensive knowledge of substance abuse treatment systems, McLellan has become a persuasive proponent of the view that addiction is a chronically relapsing condition, one that must be continually monitored and managed. McLellan has published more than 400 articles and chapters on addiction research and serves as Editor in Chief of the Journal of Substance Abuse Treatment. He serves on the editorial boards and as a reviewer of numerous medical and scientific journals, and is advisor to numerous government and nonprofit scientific organizations, including the Office of National Drug Control Policy, Research and Evaluation; the National Practice Laboratory of the American Psychiatric Association, the Swiss National Science Foundation, the World Health Organization, and the Greek government.

Constance Pechura, Ph.D., Executive Director, is an accomplished senior manager with over 25 years experience in basic research, science policy, and philanthropy. Pechura’s training and early research career were focused in behavioral pharmacology and neuroanatomy. Following a post-doctoral position at the National Institute of Neurological Diseases and Stroke, Pechura spent ten years at the Institute of Medicine, National Academies of Science, five of those as Deputy Director or Director of the Board on Neuroscience and Behavioral Health where she directed development and conduct of multiple major policy studies in addiction and mental illness. Prior to joining TRI, she spent eight years at the Robert Wood Johnson Foundation where she directed major grant programs targeting depression in primary care, addiction treatment, community health leadership, minority medical faculty development, health policy, and others. At various points during her RWJ tenure, Pechura served as Leader for program staff teams responsible for grant making in addiction prevention and treatment and building human capital.

Rosalyn Weinstein, Associate Director of TRI since January 2000, has more than 24 years of clinical and management experience in the substance abuse and mental health fields. As Associate Director, Weinstein has worked with McLellan, Durell and other senior TRI administrators to lead the organization through periods of strategic expansion, where she has analyzed and matched growth opportunities and needs of the field against internal and external capabilities. Weinstein joined TRI in 1995 after seven years in senior management positions with the Philadelphia Child Guidance Center. Other senior positions include Executive Director of Interim House, a women’s residential treatment facility for recovering substance abusers, and consultancies with the Philadelphia-based Division of Substance Abuse at Thomas Jefferson University Hospital and the Coordinating Office of Drug and Alcohol Programs for the City of Philadelphia.

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