From 1980 to 1985, Glenn lived in Düsseldorf, Germany where he studied lithography under Professor Rolf Sackenheim at the Staatliche Kunstakademie Düsseldorf, the Arts Academy of the city of Düsseldorf. Under the able tutelage of a Polish teacher, Maria Buras, Glenn mastered the lithographic process of printmaking. Kunstakademie also accorded Glenn the rare opportunity to spend time with and learn from the distinguished and influential, yet controversial, German artist Joseph Beuys. While in Germany, Glenn also produced other works outside the walls of the arts academy. The Philippine Consulate in Düsseldorf, through Honorary Consul Karl Heinz Stockheim, commissioned him to do a mural entitled Pilipinas. He also became a guest artist of Galerie Art204 in Rethelstrasse, Düsseldorf where his series entitled Cut-Outs in Paper & Wood, produced in 1985, is on permanent display. Part of the gallery’s permanent collection features works by the masters Feininger, Ernst, Chagall, Dali, Miro and Beuys.