Demut akahwina mukombe wake wekutanga wenyika kuGerman Athletics Championships muna 2003 uye akaisa hunhu hwake hwe13.74 m gore iro kuti ave wechishanu pa2003 European Athletics U23 Championships
. Akawana kusvetuka kwe13.96 m muStuttgart muna Kukadzi 2004 uye aive nematanho anoteedzana ekupedzisira kuGerman Indoor Championships muna 2004 na2005. Mwaka wake wakanyarara wa2006 wakasimudzirwa nekusvetuka kwakanakisa kwekunze kwemamita 13,96. Akabvisa chiratidzo chemamita gumi nemana kwenguva yokutanga gore rakatevera ndokutaura zita renyika zvose zviri zviviri kunze uye mukati. Demut akakunda zita reGerman rekunze zvakare muna 2008 uye akaisa wechitanhatu paEuropean Cup.