This paper aimed to study the significance of professional growth, supervisor support and empowerment on job attitudes and organizational- civil behaviors. Due to its purpose, data, nature and method, this research was an applied, quantitative, non-experimental and correlational survey respectively. All Iran Technical and Vocational Training Organization (Iran TVTO)’s headquarters staff were the research population. 225 people were selected based on a simple random sampling. Pearson correlation coefficient and regression were utilized for data analysis. The obtained results indicated that there is a significant correlation between “professional development, leadership support and empowerment”, and “job attitudes (job satisfaction and organizational commitment)”. Additionally, the findings showed that professional development and empowerment predicted 32 and 21% and job attitudes and leadership support predicted 16% of organizational citizenship behaviors among Iran TVTO’s headquarters staff.