Digital transformation has become a central driver of reform in public infrastructure delivery and government supply chains, reshaping how public value is created, governed, and sustained across project lifecycles. This review paper presents a comprehensive lifecycle-oriented analysis of digital transformation strategies applied to public infrastructure systems and government supply chains, spanning planning, procurement, execution, operations, and post-delivery evaluation. Drawing on multidisciplinary literature from public sector management, infrastructure engineering, information systems, and supply chain governance, the study synthesizes how digital technologies such as digital twins, enterprise resource planning systems, building information modeling, artificial intelligence, blockchain, and data analytics are deployed at different lifecycle stages. The review critically evaluates strategic alignment, institutional readiness, interoperability, data governance, and regulatory frameworks that shape transformation outcomes. Particular attention is given to the dynamic interaction between technological capabilities and organizational, legal, and socio-political contexts within public institutions. The paper also examines persistent challenges, including fragmented digital adoption, legacy system constraints, cybersecurity risks, skills gaps, and equity implications in digitally mediated infrastructure delivery. By structuring digital transformation through a lifecycle lens, the review identifies patterns of success and failure, maturity pathways, and feedback mechanisms essential for sustainable public sector innovation. The study contributes a consolidated conceptual foundation for scholars and policymakers by integrating lifecycle management principles with digital governance and supply chain resilience frameworks. The findings support evidence-based decision-making and offer strategic insights for governments seeking to institutionalize digital transformation as a long-term capability rather than a series of isolated technological interventions (Ibeh et al., 2023) (Eyetsemitan et al., 2023).