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In this study the validation of a German-language Core Self-Evaluations Scale (CSES; Judge, Erez, Bono, & Thoresen, 2003) is presented. Core self-evaluations are fundamental appraisals that individuals hold about their own capability, effectiveness, and worthiness as a person (Judge et al., 2003). Data were collected from 2 samples, 200 from the workforce and 134 students. The data supported the underlying single-factor solution. The German-language CSES (G-CSES) was found to be reliable and shows convergent validity with regard to internality (Krampen, 1981) and International Personality Item Pool (IPIP40) neuroticism, extraversion, and conscientiousness scales (Hartig, Jude, & Rauch, 2003) and discriminant validity with regard to the IPIP40 openness scale. The scale correlates significantly with job satisfaction and life satisfaction. Additionally, the G-CSES is incrementally valid over and above traits of the 5-factor model of personality.