Abstract The long-term goal of this project is to conduct scientifically rigorous research that identifies critical leverage points to improve alcohol use disorder (AUD) treatment during hospitalization while simultaneously acquiring training that facilitates my career development and transition to an independent researcher. Receipt of this NIAAA K08 Award will allow me to develop the skills and experiences I require in conducting advanced quantitative analytic techniques, implementation science methodology, and scholarly and professional pursuits. Through a combination of didactic coursework and workshops, attendance at national meetings, and mentoring activities, I will acquire the expertise necessary to ensure I am well poised at the conclusion of the K08 Award to execute a research agenda as an independent investigator at the intersection of AUD and implementation science. Using a mixed-methods approach informed by an implementation science framework, the research strategy proposes to combine results from “big data”-- including insurance claims and electronic health record data-- with qualitative data from key stakeholders to identify leverage points within the hospital system to increase the implementation of AUD treatment. The proposed project has the following specific aims: 1) examine the real- world effectiveness of AUD treatment as measured by alcohol-related acute health care utilization; 2) examine the prevalence and correlates of AUD treatment during hospitalization; and 3) use quantitative and qualitative data inputs to model pathways for improved implementation of AUD treatment during hospitalization. Completion of these Aims, which complement my training and career development goals, will provide important information on how to improve the care of the high-risk population of hospitalized patients with AUD.