This support document accompanies the research summary "From VET to Sustainable Employment for Aboriginal and Torres Strait Islander Peoples," which examines the contribution of vocational education and training (VET) participation to sustainable employment for this cohort of the Australian population. The purpose of this document is to provide a technical discussion of the data extraction and transformation approaches used in the research, as well as an explanation of the research methodologies. The main source of data for this research is the Australian Bureau of Statistics (ABS) Multi-Agency Data Integration Project (MADIP). This report details the scope of the data used in the analysis, including the criteria for inclusion and exclusion of individuals and training programs. It also describes the construction and treatment of the control groups used in the regression models and comparative analysis. A mix of methodologies was used in this research, including k-nearest neighbors (KNN) matching, difference-in-differences (DID) logistic regressions, multiple logistic regression and comparative analyses. These methods were implemented to estimate the impact of VET participation, as well as the influence of an individual's personal and training characteristics, on sustainable employment. By describing the data sources, extraction and transformation processes, research methodologies and analytical techniques used in the study, this document serves as a tool for readers seeking a deeper understanding of the research findings. [For the research summary, see ED631902.]