ITIL 4 Specialist: Sustainability in Digital and IT mandates that IT professionals, sustainability leads, and digital architects integrate sustainable practices into the service value chain. The curriculum focuses on mapping IT infrastructure, cloud services, and data center operations against global ESG metrics and UN Sustainable Development Goals. Practitioners analyze software-defined networking, hardware lifecycle management, and energy-efficient architecture through the ITIL SVS framework. Participants assess digital supply chain transparency, circular economy principles, and carbon footprint reduction strategies. Proficiency requires applying ITIL governance to mitigate environmental impacts, optimize resource consumption within technical ecosystems, and embed sustainability performance indicators into digital operational workflows.