He received several awards for his actions during the war, including the Escapees' Medal and the Volunteer Combatant's Cross.

His importance eventually grew to the point where he became Governor General of French West Africa.

[1] Under the Vichy regime, Geismar was subjected to extreme persecution, and told by authorities that he would have to give up all his posts within a month.

[2] He was married to a Malagasy Catholic, Marguerite Mouneyres, a descendant of Ranavalo III, and had one daughter.

Geismar was fluent in six languages (including French, German, Hausa, and English) and had at least some knowledge of Italian, Portuguese, and Dutch.