After the award of his doctorate, Zermelo remained at the University of Berlin where he was appointed assistant to Planck who held the chair of theoretical physics there.
Pagkatapos ng award ng kanyang mga titulo ng doktor, Zermelo naiiwan sa Unibersidad ng Berlin kung saan siya ay hihirangin assistant sa Planck na gaganapin sa silya ng panteorya physics doon.