Mega and giga projects depend on logistics networks that are temporary, capital intensive, internationally sourced and exposed to severe schedule penalties. In these environments, third-party logistics providers no longer perform a narrow transport role; they become integration partners that connect procurement, warehousing, expediting, material visibility and supplier performance management. This review examines how digital transformation reshapes those 3PL services between 2020 and 2025, with emphasis on the data, governance and operating capabilities needed for very large project ecosystems. The aim is to develop a coherent review-based framework that explains how digital platforms, analytics, automation and collaborative information systems can improve decision quality from early sourcing to site delivery. The paper adopts a structured integrative review methodology, drawing on recent literature on digital supply chains, sustainable 3PL capabilities, megaproject supply chain governance, procurement digitalisation, logistics technologies and performance measurement. The analysis identifies four service domains that must be integrated through a common digital thread: intelligent procurement support, responsive warehousing, milestone-based expediting and supplier performance management. It argues that value is created when 3PL providers transform fragmented transactions into governed visibility, predictive exception management and evidence-based supplier development. The review contributes a process architecture, a maturity pathway and managerial implications for project owners, EPC contractors and logistics providers seeking more reliable, transparent and sustainable delivery in mega and giga projects.