Interplay of cultural values and management practices is still core to organizational performance especially in developing economies where native norms have a strong bearing on the workplace behaviour. This paper will discuss the importance of Theory Z collectivist culture and how it affects the business environment in Nigeria. Based on the early contribution of William Ouchi, Theory Z insists on long-term employment, decision-making as a group, trust, and holistic concern towards employees. These values are more or less related to the collectivist cultural orientations as postulated by Geert Hofstede and Triandis. The socio-cultural setting in Nigeria (networks in a community, extended family, relationships and high-power distance) is a good fit (provide a good context) through which the theory of Z can be assessed to be relevant or not. Through conceptual analysis alongside empirical literatures, the paper examines the fit between the principles of Theory Z and the Nigerian organizational culture and evaluates how the concepts can help to increase the commitment of employees, workplace teamwork, participatory decision making, and trusting management. The results show that Theory Z resonates with the collectivist orientation of the Nigerian country though the focus on the consensus-driven decision-making process can be constrained by the stance of the hierarchical framework and the focus on centralized authority figures. Moreover, the contextual issues with implementing the long-term employment practices include infrastructural limitations, financial unpredictability, and the changing generational values. The paper concludes that Theory Z provides a framework with culturally resonant ideas on how to improve organizational performance in Nigeria when effectively adjusted to the realities on the ground.