Pedzisa mutsara unotevera: Kalmer akaberekerwa munharaunda yeRoodepoort muJohannesburg. Midhiya yake yekutanga yepasi rose yakauya pa1997 African Junior Athletics Championships, kwaakawana menduru yebronze mumitambo yemamita 1500 uye 3000 metres. Semumhanyi wechidiki akakwikwidza pa1998 World Junior Championships muAthletics uye paWorld Cross Country chiitiko kubva 1996 kusvika 1999. Kuoneka kwake kwokutanga kwenyika dzakawanda kwevakuru kwakatevera makore maviri gare gare: akauya wechi30 mumakwikwi maduku pa
2001 IAAF World Cross Country Championships uye akamhanya mumakwikwi emamita 1500 pa2001 World Championships muAthletics. Akapedzawo ari wechigumi nerimwe pamakumi mashanu emamita pa2001 Summer Universiade. Akanga ari menduru yesirivha paFISU World University Cross Country Championships muna 2002, achipedzisa shure kwaDenisa Costescu. Pamamita zviuru zvishanu akawana nzvimbo yechisere paZhizha Universiade muna 2003, yechipfumbamwe pa2007 All-Africa Games uye yechitanhatu pa2008 African Championships.