Rehabilitation counselor skills, knowledge, and training are significant predictors of quality of employment outcome. In the past decade, vocational rehabilitation (VR) and placement-related work settings in Taiwan have gone through a tremendous amount of change to reflect changing policies, types of disabilities, and global factors. VR professionals’ competencies also need to be addressed to keep pace with this transformation. The purpose of this study was to validate the Taiwanese version of the Systems Approach to Placement: Self-Assessment for Students and Counselors (SAP-SASC), designed to identify critical areas of knowledge, skills, and competencies possessed by practicing VR professionals. A total of 116 participants completed the instrument. The participants represent (a) rehabilitation counseling master’s students from National Changhua University of Education, National Kaohsiung Normal University, and National Taiwan Normal University and (b) job coaches, VR case managers, and other VR professionals from the Council of Labor Affairs in Taichung, Changhua, Nantou, and Taipei counties. Multi-trait scaling analysis revealed eight components of VR professionals’ competence (client, health, education, family, social, employer, placement, and funding). The respondents expressed the highest level of competence in providing job seeking and social skills training, addressing job modification needs, performing job analysis, and referring clients of community-based support services.