The main objective of this study was to determine the factors that influence affective organizational commitment. The research framework contained three independent variables, namely Human Resource Practices (career development and financial incentives), Social Support, and Personality Traits (Conscientiousness and openness to experience). The dependent variable of this study was affective organizational commitment of employees. The targeted sample was the employees of private higher education colleges in Oman. The current research used the survey method. 181 questionnaires were distributed and 140 questionnaires were received back, giving the study a response rate of 77%. The analysis method used was structural equation modelling PLS. The main finding of the study showed that human resource practices, social support, and personality traits had significant influence on affective organizational commitment.