Rubuta ci gaba don wannan sakin layi - Gasar farko ta Oeser ta kasa da kasa ita ce gasar zakarun duniya ta matasa ta 2002 a wasannin motsa jiki kuma ta gama a matsayi na takwas tare da maki 5405. Ta inganta aikinta na sirri zuwa maki 5901 don lashe lambar zinare a gasar zakarun Turai ta 2003 U23
Ka yi haƙuri. 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.