 Dunham akamiririra New Zealand paMutambo weAustralian Youth Olympic Festival muna January 2013 muSydney, kuAustralia. Mumakwikwi evanhu vaviri, akauya wechi15 pavakwikwidzi 18. Mumakwikwi evarume vana, akahwina menduru yendarira nechikwata chake. Mumakwikwi masere, akahwina menduru yesirivha. Akakwikwidzawo pa 2013 Summer Universiade muKazan, Russia. Kuonekwa kwake kwekutanga kwepasi rose paFISA regatta yaive pa2014 World Rowing U23 Championships muVarese, Italy, kwaakauya wechipfumbamwe muU23 lightweight double sculls akabatana naToby Cunliffe-Steel. Pa2015 World Rowing U23 Championships muPlovdiv, Bulgaria, akauya wechina muU23 lightweight double sculls akabatana naBryce Abernethy. Dunham akaenda ku2016 Summer Olympics muRio de Janeiro, Brazil, sechinhu chekuchengetedza kwevarume vana vechiremera chechiedzaasi haana kukwikwidza. 