On the occasion of the 25-year anniversary of the International Conference on Computational Science (ICCS), Computational Science NL has interviewed Peter Sloot, (emeritus) professor at the University of Amsterdam and Nanyang Technological University (Singapore), and co-founder of ICCS. ICCS is an annual conference bringing together computational science researchers across all disciplines to discuss new computational methods to model the world around us. Throughout its lifetime, ICCS has contributed to the birth and growth of the international computational science community. ICCS 2025 will take place on 7-9 July in Singapore; Registration for non-authors is open until June 2nd.