Worked on the UCL/TLOmodel repository to enhance reliability and maintainability by refactoring resource path handling within simulation modules. Using Python and applying principles of software architecture and code maintenance, centralized the management of resource file paths to ensure consistent propagation from the Simulation constructor to all dependent components. This targeted change addressed a persistent bug that caused resource access failures, reducing runtime errors and improving the stability of continuous integration processes. The refactor also standardized resource access patterns, making the codebase easier to test and extend, and laying a solid foundation for future enhancements to simulation resource management.