Kammala jumla mai zuwa: Gasar farko ta Oeser ta kasa da kasa ita ce Gasar Zakarun Duniya ta Duniya ta 2002 a Wasanni kuma ta gama a matsayi na takwas tare da maki 5405. Ta inganta nata na sirri zuwa maki 5901 don lashe lambar zinare a gasar
2003 Gasar Zakarun Turai na 'Yan Wasanni na U23. Da yake hawa zuwa manyan mukamai, ta kammala na huɗu a cikin heptathlon a gasar zakarun Turai ta 2006 a Gothenburg kuma ta kasance ta bakwai a cikin wannan taron a gasar zakarun duniya ta 2007 a Wasannin motsa jiki. Oeser ya kasance na goma sha ɗaya a wasannin Olympics na bazara na 2008 a Beijing. Ta kafa mafi kyawun maki na 6493 don lashe lambar azurfa a cikin heptathlon a Gasar Cin Kofin Duniya ta IAAF ta 2009 a Berlin. A shekara mai zuwa ta kasance a Taron Erdgas a Ratingen, Jamus, tana hana abokin hamayyarta na cikin gida Lilli Schwarzkopf don cin nasara tare da jimillar maki 6427.