Evren Robyn developed core geometry construction enhancements for the SCEPCal calorimeter within the key4hep/k4geo repository, focusing on modular and scalable detector modeling. Using C++ and XML configuration, Evren implemented partial calorimeter construction and advanced visualization controls, enabling selective assembly of detector components based on phi, theta, and gamma ranges. The work included refactoring placement logic to support modular placement of staves and towers, which improved maintainability and adaptability of the geometry construction workflow. By adding detailed segmentation files and enhancing visualization, Evren laid the foundation for more accurate detector simulation and streamlined iteration in high-energy physics simulation pipelines.