Analysis of the Principal's Transformational Leadership in Developing Teacher Competency Improvement at Ar-Risalah Vocational High School, Jonggol, Bogor, West Java, Indonesia

This study aims to analyze the application of the Principal's transformational leadership model and its impact on the development and improvement of teacher competencies at SMK Ar-Risalah, Jonggol, Bogor. Improving teacher competencies is crucial in Vocational High Schools to ensure the quality of graduates who are ready to work. The Principal, as a transformational leader, is expected to be a catalyst for change and inspiration in the school environment. The research method used is descriptive qualitative with a case study approach. Data collection was carried out through in-depth interviews with the Principal, Vice Principal for Curriculum, and a number of teachers, participant observation, and analysis of school documents related to teacher development programs. Data validity was tested using source triangulation. The results of the study indicate that the Principal of SMK Ar-Risalah has implemented the dimensions of transformational leadership, including: Idealized Influence (being a role model), Inspirational Motivation (providing enthusiasm and vision), Intellectual Stimulation (encouraging critical thinking and innovation), and Individualized Consideration (providing personal attention and guidance). This implementation has a significant impact on teacher development, as evidenced by: (1) Increased teacher participation in training and certification programs; (2) Adoption of innovative learning methods (for example, the use of digital technology); and (3) Increased collaboration between teachers in developing competency-based teaching modules. In conclusion, the Principal's transformational leadership plays a key role as a driving factor in creating a culture of continuous learning, which is directly positively correlated with the improvement of teachers' professional and pedagogical competencies at Ar-Risalah Vocational High School.