The purpose of this study was to contribute to the understanding of individual differences regarding the development and importance of job satisfaction. This thesis is split into two sections. In the first section a statistical analysis is performed using the data of the SHAPE-study, a survey on highly ambitious individuals. This analysis focuses on the relationship of personal and situation specific factors. The second section uses qualitative interviews to examine individual assignation of meaning and patterns of explanation. The results of the study show that the individual degree of job satisfaction is influenced, in particular, by pay satisfaction, recognition, pressure at work, sense of coherence and job content. Most signifi-cantly, the aspects of pay satisfaction, recognition and job contents only develop relevance after a normative appraisal. However, no significant explanatory power is provided by either the literal amount of salary or the average working hours. The combination of quantitative and qualitative research methods facilitated the exploration of the complexity of the construct of job satisfaction, the divers personal and situation specific influencing factors, as well as the indi-vidual assignations of meaning.