Infrastructure delivery processes possess the potential to negatively influence sustainability. To curb the incidence of these processes within infrastructure delivery systems, the enthronement of an effective project management and governance framework becomes imperative. This led to the emergence of literature on sustainable project management practice. However, studies seeking to modify existing project governance structures in like manner remain limited. This study contributes to this emerging discourse on the utility of project governance competencies in facilitating sustainable infrastructure delivery. To achieve this objective, this study identifies critical success factors central to the design of effective sustainability governance structures of a typical infrastructure delivery (ID) system with the assistance of a cybernetic system framework&mdash / the viable infrastructure delivery systems model (VIDM). Adopting a qualitative multi-case study research design, this study deploys semi-structured interviews for data elicitation through purposively sampled interviewees within the identified cases and a document review. Qualitative content analysis (QCA) was deployed for data analysis. Findings from this study provide success factors for designing effective sustainability governance structures for ID systems. It is expected that the findings from this study will contribute to the emerging discourse concerning sustainability governance of ID systems.