http://www.iaeme.com/IJCIET/index.asp 1124 editor@iaeme.com International Journal of Civil Engineering and Technology (IJCIET) Volume 10, Issue 05, May 2019, pp. 1124-1131, Article ID: IJCIET_10_05_112 Available online at http://www.iaeme.com/ijciet/issues.asp?JType=IJCIET&VType=10&IType=5 ISSN Print: 0976-6308 and ISSN Online: 0976-6316 © IAEME Publication THE EFFECT OF TRANSFORMATIONAL LEADERSHIP, ORGANIZATIONAL CULTURE, JOB SATISFACTION, AND ACHIEVEMENT MOTIVATION ON THE PRINCIPAL’S ORGANIZATIONAL COMMITMENT OF JUNIOR HIGH SCHOOL IN MEDAN CITY Henny Supervisor of Junior High School, Medan City Biner Ambarita Postgraduate Lecturer, Universitas Negeri Medan Harun Sitompul Postgraduate Lecturer, Universitas Negeri Medan Paningkat Siburian Postgraduate Lecturer, Universitas Negeri Medan Benyamin Situmorang Postgraduate lecturer, Universitas Negeri Medan Sukarman Purba Postgraduate Lecturer, Universitas Negeri Medan ABSTRACT The aim of the study were to analysis the effect of the organizational commitment model of principal built on associative causal relationships between exogenous variables and endogenous variables to be adaptively implemented in junior high school in Medan, the effect of transformational leadership directly on the job satisfaction, organizational culture directly on the job satisfaction, transformational leadership directly on the achievement motivation, the organizational culture directly on the achievement motivation, transformational leadership directly on the organizational commitment, the organizational culture directly on the organizational commitment, job satisfaction directly on the organizational commitment, and the achievement motivation directly on the organizational commitment. The research was carried out in 2018 with sample of 197 principals of junior high school in Medan City, selected proportional random sampling. The data analysis technique used descriptive analysis and inferential analysis. Based on those findings it could be concluded that