Abstract We investigated the effects of leadership and tangible and intangible resources on sustainable competitive advantage. A cross-sectional survey was conducted using the Seventh-day Adventist Church Institutions in Zimbabwe. A questionnaire was administered to 341 respondents. The results of the correlation analysis show that leadership (r = .57; p<.01), tangible resources (r =. 53; p< .0l), and intangible resources (r =. 43; p< .05) significantly correlate with sustainable competitive advantage. Furthermore, the regression analysis showed that all three variables combined had a significant effect on sustainable competitive advantage (adjusted R-square = .359) (F (3, 327) =62.61, p<0.05). Additionally, the analysis shows that leadership (β = .370; p < 0.05) and tangible resources (β = .273; p < 0.05) contributed the most to the institutions’ sustainable competitive advantage. However intangible resources, singly, do not significantly affect the competitive advantage. The results confirm the key role of leadership in creating a competitive advantage in organizations. Thus, the study highlights that without leaders’ willingness and effective engagement, those institutions cannot effectively compete in the marketplace despite the presence of resources.