The topic of this thesis is a review of the organization's work environment on the design of the organizational structure, with a practical example of the environment influence through external factors of organizational design on the company Projekt inzenjering d.o.o. for construction, engineering and services, Pozega. In order to explain the impact of the organization's environment on the organization's organizational structure, it is necessary to outline the theoretical framework, which clarifies the contemporary view of the organization and contemporary theories of the organization, as well as the contemporary trends in the organization, and also the importance of an organization that teaches or teaching organization in the context of organizational changes. In addition, to make the picture more complete, the thesis explains the organization's dimensions in the context of change management, and the basic types of organizational structure in contemporary organizational design, with particular attention being paid to the most important external factors of organizing the organization in the context of the market environment on a concrete example shown in the practical part of the thesis. The practical part of the thesis shows the influence of the environment through the most important external factors of organizational design on the company Projekt inzenjering d.o.o. with an individual description of the impact of each of the most important external factors on the development and operation of the said enterprise, and the design of its organizational structure.