Tile aim of this study is to assess the relationships between age and various personality variables (i.e., morningness, languidit)i; flexibilihj, neuroticism, and extroversion) on a variety of wellbeing scores, including: (1) physiological (i.e., chronic fatigue, cardiovascular symptoms, and digestive symptoms), (2) psyclwlogical (i.e., cognitive and somatic anxiety), and (3) total sleep disturbance. It was hypothesized that morningness, flexibility, and extroversion scores would have a significant beneficial relationship with subjective well-being. In contrast, age, languidity, and neuroticism scores would have a significant adverse relationship with subjective well-being. One hundred and twenty-nine Police Officers completed a modified version of the Standard Shijhvork Index (SSJ). I11e results of the Pearson's product coefficients indicated that higher morningness, flexibility, and extroversion personalihj scores were related to increased subjective well-being, while age, languidity, and neuroticism were correlated with reduced subjective well-being. Tile results of this current study provide additional empirical support for the premise that an individual's personality may moderate both psychological and physiological well-being. In addition, the impact of the outlined personalihJ measures may either exacerbate or attenuate the ability to adapt successfully to a shift-working lifestyle.