The purpose of this study is to explore the roadmap of performance competency of vocational training teachers belonging to TCPDD under the Korea Employment Agency for Persons with Disabilities, focusing on PDD's perspective on lifelong vocational competency development. The research method was composed of the process of participating observation and FGI with experts in related fields, and the data collection and analysis work was carried out by synthesizing the response data through FGI and journal writing through participant observation. The contents of the study were presented in the context and level of the roadmap for the competencies of vocational training teachers working at the TCPDD under the Korea Employment Agency for Persons with Disabilities. Accordingly, the performance competency of the above vocational training teachers was presented in three major dimensions. Basic cognitive and motivational competencies, educational professional competencies, and administrative professional competencies are the results. In detail, in relation to the above three upper competencies, competencies for understanding the specificity of developmental disabilities, competencies for understanding lifelong education convergence based on individualized rehabilitation plan (IRP) or individualized-based planning (IBP), competencies for business jobs and lifelong vocational self-reliance development, generalization-based job virtual reality (VR) restructuring planning competencies, competencies for utilizing professional teacher-type vocational teaching and learning, competencies for circulation leadership between lifelong education and employment services, and competencies for establishing and operating a cooperative system between related institutions were presented. Through the results of the study, it was understood that TCPDD under the Korea Employment Agency for Persons with Disabilities has the status and identity to lead the importance and practice of vocational training at the level of the starting point for the transition of PDD to adulthood, and it was analyzed that whether the performance capabilities of vocational training teachers belonging to TCPDD are embodied in the level and context of the roadmap is the biggest task.