In Paris he studied at the Julian Academy and worked in the studio of François Flameng.

From 1906 Geiger illustrated twenty Hungarian editions of the works of Karl May for the Budapest Athenaeum publishing house.

[4] During World War I he worked as an illustrator for the Hungarian weekly Tolnai Világlapja.

In the 1920s he illustrated a large number of books[5] and produced numerous portraits of Pierrette (the female version of a Pierrot).

[6] He won several prizes in graphic competitions[7] and took part in exhibitions in France, Germany and Hungary.