The paper shall examine the relationship between organizational culture and performance measures and the relation of specific cultural types with performance indicators (such as profitability, growth and qualitative factors), in order to support managerial efforts to cultivate an inimitable operational strategy. Based on data from both, fixed and mobile operators in Greece and the use of ANOVA methodology, key findings have been revealed with reference to organizational culture and economic performance. A control-oriented tendency in telecommunication industry has been indicated as a whole, with cultural variations among fixed and mobile operators, along with significantly important differences on performance indicators.