ABSTRACT: This study examines the influence of professionalism, achievement motivation, and Organizational Citizenship Behavior (OCB) on the performance of personnel within the Criminal Investigation Unit of Bontang Police Resort. Utilizing a quantitative approach, data was collected from 59 personnel through questionnaires and analyzed using Partial Least Squares Structural Equation Modeling (PLS-SEM). The results reveal significant positive relationships between professionalism, achievement motivation, OCB, and personnel performance. Dedication to the profession and innovation were identified as the most influential indicators of professionalism and achievement motivation, respectively. Additionally, the civic virtue dimension of OCB emerged as crucial in explaining its variance. The study underscores the importance of fostering professionalism and achievement motivation among police personnel to enhance their performance, while emphasizing the mediating role of OCB in this relationship. The findings offer valuable insights for policymakers and practitioners in law enforcement agencies, highlighting the need to create a supportive environment that encourages and rewards OCB to improve overall organizational effectiveness.
KEYWORDS: professionalism, achievement motivation, Organizational Citizenship Behavior (OCB), personnel performance, Criminal Investigation Unit.