Career
He worked as a mining engineer in Ibbenbüren for German company Preussag. In 1937, Grebe invented the Kohlenhobel (coal plow). Grebe was married with Luise Grebe.
He was buried on central cemetery in Ibbenbüren.
Hans Röhrs: Die Wiege des Kohlenhobels (with short biography of Konrad Grebes).