This study evaluates the empirical applicability of the career construction model of adaptation (CCMA) by collecting evidence about the validity of the Student Career Construction Inventory (SCCI) from a sample of Turkish high school students and examining the relations between adaptive readiness, adaptability resources, adapting responses, and adaptation results. To test the model, we conducted two studies with samples of high school students in Ankara, Turkey (n (1) = 251; n (2) = 694). In the first study, the SCCI was translated into Turkish and psychometric properties of the inventory were assessed. To validate the four-factor structure of the SCCI Turkish High School Form, two different levels of confirmatory factor analysis (CFA) were applied to 251 participants. The results of CFA demonstrated that the data for the SCCI Turkish high school sample fit the theoretical model very well. The internal consistency of the SCCI was determined as 0.72 for crystallizing, 0.75 for exploring, 0.85 for deciding, 0.73 for preparing, and 0.90 for the total. In the second study, the CCMA, consisting of four dimensions (adaptive readiness, adaptability resources, adapting responses, and adaptation results), was empirically tested by using the SCCI, which had been tested for validity in the first study. The results of serial mediation analysis supported the CCMA, indicating that adaptive readiness indirectly influenced adaptability resources, adapting responses, and adaptation results.