The purpose of this study is to analyze previous research on consultant competencies, which has developed from various perspectives, and to suggest directions and implications for future research. Using a systematic literature review method, 42 domestic academic journal articles were selected for analysis, focusing on the publication period, journal type, keywords, and competencies required in different consulting fields. The findings are as follows: First, research on consultant competencies was minimal before 2010 but has increased significantly since. Second, journals show that consultant competencies are needed in diverse fields, with digital technology, talent development, and convergent thinking being key. University-affiliated institutions have contributed to strengthening the theoretical foundation through various methodologies. Third, keyword analysis highlighted relationship-building skills, service quality, and knowledge as essential competencies. Fourth, the analysis identified the need for a systematic competency model, emphasizing problem-solving, communication, customer orientation, change management, and adaptability. Based on these findings, this study highlights the need for systematic research on competencies within the consulting process from a macro perspective, while also emphasizing the importance of expanding research on consultants' intrinsic competencies from a micro perspective. Furthermore, it suggests that the application of methodologies combining various academic perspectives in a convergent approach should be expanded. This study is expected to serve as a foundational resource for future research on consultant competencies.