Advancing supply chain management in Malaysia requires a clearer understanding of how integration and implementation practices influence operational efficiency, resilience, and long-term competitiveness. The study synthesises contemporary literature to analyse the interplay between internal alignment, digital transformation, external collaboration, sustainability requirements, and halal compliance across Malaysian industries. Evidence shows that internal fragmentation, limited cross-functional communication, and inconsistent process standardisation continue to weaken the foundations of supply chain integration. Digital technologies offer significant potential to enhance visibility, coordination, and decision quality; however, uneven digital maturity, system incompatibility, and cybersecurity concerns restrict widespread adoption. External integration remains constrained by transactional supplier relationships, weak relational governance, and variable logistics capabilities. Sustainability and halal logistics introduce additional operational demands that require integrated monitoring systems, harmonised standards, and improved supplier capabilities. Effective implementation depends on leadership commitment, workforce readiness, organisational learning, and adequate resource allocation. The overall analysis highlights that Malaysia’s progress toward fully integrated and effectively implemented supply chains hinges on coordinated technological investment, capability development, and multi-stakeholder collaboration. The study offers theoretical contributions and practical insights for strengthening integration outcomes within Malaysia’s evolving supply chain ecosystem.