Studies in different research fields have shown that locus of control is a meaningful concept. A translated measurement of locus of control in Greece is the Brown locus of control scale (BLOCS), but the translation has not been yet validated. Construct validity and reliability of the BLOCS Greek version was investigated in a sample of employees in five public institutions. Three dimensions identified in the original study were observed. A reduced scale of 20 items showed better psychometric properties: Cronbach's alphas were for the total scale .76 (McDonald's omega = .72), and internal .76, external social .73, and external other .73, comparable to the original and improved if 5 items are removed.