Developed secure JWKS-based token validation for the mns-mock-hydration flow within the NHSDigital/identity-service-jwks repository, focusing on configuration management and DevOps practices. The work involved implementing Proxygen JWKS configuration to enable token validation in a mocked environment, ensuring alignment with identity service security standards and laying the foundation for production-ready validation. Using Shell scripting and configuration management tools, the developer established a consistent approach to identity checks across services. This feature addressed the need for secure, reliable token validation in test scenarios, supporting future scalability and compliance with organizational security requirements without introducing any bug fixes during the period.