Kariuki, AnneAmbula, RoseWasike, Shadrack2018-02-122018-02-122016-062348 0386http://karuspace.karu.ac.ke/handle/20.500.12092/2085Ever growing dynamism in the world requires Top Management Teams (TMT) in strategy formation and organizational performance. Empirical work on the relationship between TMT and organization performance yields conflicting and inconclusive results. Some studies show positive relationship, others show negative and no relationship. The inconclusive results represent a gray area in which we attempt to fill by exploring other factors that affect the relationship. Specifically, we consider the moderating effect of competitive environment on the relationship between TMT and organizational performance. In additional, strategy implementation is an important variable that mediates the relationship between TMT characteristics and firm performance. A proposed conceptual framework is proposed for further empirical research is presented. Keywords: Top management team characteristics, Strategy Implementation, Competitive Environment, PerformanceenTop management team characteristicsStrategy ImplementationCompetitive EnvironmentPerformanceArticle