Kammala jumla mai zuwa: An haifi Kalmer a yankin Roodepoort na Johannesburg. Gwarzonta na farko na kasa da kasa ya zo ne a gasar zakarun Afirka na matasa na shekarar 1997, inda ta kasance ta lashe lambar tagulla a duka tseren mita 1500 da na mita 3000. A matsayinta na matashi mai tsere ta yi gasa a gasar zakarun duniya ta matasa ta 1998 a wasan motsa jiki da kuma a gasar tsere ta duniya daga 1996 zuwa 1999. Wasan farko da ta fara yi na kasa da kasa ya biyo bayan shekaru biyu: ta zo na 30 a cikin gajeren tseren a gasar cin kofin duniya a shekara ta 2000.
2001 IAAF World Cross Country Championships kuma ya gudu a cikin 1500 m zafi a 2001 Gasar Cin Kofin Duniya a Wasanni. Ta kuma gama na goma sha ɗaya a mita 5000 a Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Ita ce ta lashe lambar azurfa a Gasar Cin Kofin Duniya ta FISU a shekarar 2002, inda ta gama a bayan Denisa Costescu. Fiye da mita 5000 ta kasance ta takwas a Wasannin Universiade na bazara na 2003, ta tara a Wasannin Duk Afirka na 2007 kuma ta shida a Gasar Zakarun Afirka ta 2008.