Organizational efficiency and effectiveness result from aligning organizational needs and IT. Consequently, the structure of an IT Organization is crucial for obtaining good results, particularly in product and service delivery. However, in spite of the importance that IT Organization might have, no relevant documentation about its structure is found. As a result, using the Portuguese Navy as a case study to the design research, this paper aims at reviewing the main related research work and proposes a conceptual framework for structuring an IT organization. Through the proposed framework, it is possible to rationally structure an IT organization and, thus, contribute to the research in this area.