Purpose: To verify the dimensions, reliability and validity of Internal Market Orientation (I.M.O.) as a scale of measurement of internal marketing, and using it to measure the effect of internal marketing on the satisfaction of contact personnel. Design/ Methodology/ Approach: interviews were carried out with all the cashiers of the 16 branches of a small, local credit institution. Findings: The results show the validity and reliability of the I.M.O. construct, formed by four of the five dimensions of the original scale. They also corroborate the causal relationships among the four dimensions, as well as the significant influence of the informal dimension of I.M.O. on the satisfaction of contact personnel. Research limitations/ Implication...