Careers are a reality of life that need to be considered as multi-dimensional in today’s modern societies. Choosing a career is a complex process that coincides with high school and university ages, creating psycho-social stress. Considering the literature, the effects of different environmental factors have been revealed in separate studies. This study examines both individual and environmental factors together. By adopting a quantitative research method, we collected cross-sectional data through online questionnaires from 1130 university students. The association of family influence and academic satisfaction with happiness through career decision self-efficacy was meaningful using gender, age, income, and parents’ education as control variables.