I have 25 years of experience, and specialize in the field of addiction psychiatry with specific knowledge in the areas of genetic risk, diagnosis and treatment. I have published on such topics as the assessment, genetics and treatment of alcohol and drug dependence. I have testified 6 times on topics such as the suitability of impaired physicians to practice medicine, outcomes of substance dependence treatment and the role of substance use in work related injury. My primary professional activity has been in patient care and clinical research. I have done some expert testimony on an occasional basis.