Kilian Volmer contributed to the SciCompMod/memilio repository by focusing on the stability and correctness of age-structured SEIR ODE modeling. He identified and fixed an indexing error in the model’s handling of susceptible compartments across multiple age groups, which previously led to incorrect scenario analyses. To ensure ongoing reliability, Kilian implemented a targeted regression test in C++ that verifies flow calculations between two age groups, strengthening the model’s test coverage. His work emphasized maintainable code and robust software testing practices, resulting in improved accuracy for epidemiological simulations without introducing new features or impacting performance, demonstrating depth in ODE modeling and C++ development.