The Climate Resilient Water Services Masterclass is a practical training programme developed by the Global Center on Adaptation, in collaboration with IRC WASH, to strengthen the capacity of water and sanitation professionals to address climate risks in service planning, infrastructure and operations. Combining self-paced online learning with an interactive in-person workshop, the masterclass equips government officials, utilities, regulators and sector practitioners with tools to understand climate hazards, undertake climate risk assessments, identify adaptation and resilience options, and apply these in water and sanitation investment planning. GCA piloted the masterclass in Nairobi in December 2025, with the Kenya School of Government, as a training-of-trainers programme that brought together participants from K-WASH counties and national water institutions. Through climate data, case-based exercises and practical planning tools, the training helps participants strengthen how climate risk is assessed and translated into infrastructure and service decisions. Developed as a replicable package, the material can now be adapted and delivered in other contexts beyond Kenya, including through French-language versions intended to support rollout in West Africa.