Dr. Mosier is a Licensed Clinical Psychologist in Illinois and Louisiana, a Medical (prescribing) Psychologist in Louisiana and a Prescribing Psychologist in Illinois. The majority of her clinical focus has been with LGBTQ+ individuals, chemical dependency treatment and trauma informed care. A particular focus is treating people who have mood disorders and who are HIV+. Dr. Mosier volunteered at the first domestic violence shelter in Chicago. She has worked in residential CD treatment programs, a methadone maintenance program, psychiatric hospitals, outpatient programs and in private practice. She had a psychological and neuropsychological assessment practice for many years. She has taught diagnostic and therapy practicums and for 3 years in the 1980’s she helped develop and teach the first PsyD course on LGBTQ competency. She was the psychologist for the first LGBTQ inpatient dual diagnosis program The Pride Program, and subsequently developed and ran Living With Pride, the first LGBTQ sober living house in Chicago. She was the Director of Mental Health and Youth Services for the Center on Halsted and, with Northwestern University, developed the first APA approved LGBTQ psychology internship. For 20 years she was a consulting psychologist for the Department of Children and Family Services – working primarily with DCFS “rainbow” youth. In 2016 she returned to school to obtain a postdoctoral master’s degree in psychopharmacology. In 2019 she became licensed to prescribe psychotropic medications in Louisiana and in 2020 she became the 6th Prescribing Psychologist in Illinois.