This study aims to investigate, identify and analyze how the competitive strategies affect companies’ performances in the telecommunications services providers industry. We first performed a revision of the theoretical framework that underpins the research to identify the strategic variables, environmental performances and models and typologies. For a sample set containing 30 companies listed on New York Stock Exchange, data were collected in accounting documents published by companies and supplemented by survey, considering five years between 2004 and 2009. These data were analyzed using multivariate statistics which allowed the identification and composition of the strategic groups (clusters). Next, we checked the adherence among the strategic typology and clusters chosen and examined the performance differences between the various clusters, emphasizing the study of the relationship between strategic positioning and performance. The test results suggested an alignment between the used typology and statistical results confirming the initial assumptions of the empirical research.