In July 2022, I received the EURO Gold medal at the 32nd EURO Conference held in Espoo, Finland. On this occasion I was asked to deliver a 30-minute presentation on my major and recent contributions to the body of knowledge in operational research. To this end, I have selected 10 topics that illustrate the breadth of my research interests and achievements over the 50 years spent since I started my Ph.D. studies in 1972, until 2022. These topics are the seriation problem, rotating work schedules, deterministic vehicle routing, stochastic vehicle routing, examination timetabling, districting, waste management, metro network design, green transportation, and humanitarian logistics. The present paper expands on my award ceremony presentation.