 During his studies he founded (together with Ton Smit) the Venlo chapter of the "Nederlandse Vereniging voor Weer- en Sterrenkunde" (Dutch association for meteorology and astronomy) on April 18, 1965 (since 1990 known as the "Weer- en Sterrenkundige Vereniging "Jean Delsing"").The next year he organized the exposition "Mens en het Heelal" (Man and the Universe), then the largest meteorology, astronomy and space travel exposition ever held in the Netherlands.After having lived and worked in the United States and France (both for two years) he became a presenter of Dutch radio and television programmes about science and technology.