Guy akazozivikanwa pasi rose paakakunda menduru mbiri dzegoridhe paWorld Championship mumakwikwi e200-metre freestyle uye 4×200-metre freestyle relay paWorld Aquatics Championships muna 2015. Anoshambira zvikuru, muna 2016, akahwina sirivha mu 4x200m freestyle relay uye 4x100m medley relay
kumaOlympics eRio, achipedza ari 4th mumutambo wemamita 200 wevanhu vari voga. Akabatsira kudzivirira varume 4 x 200 metres freestyle relay zita renyika muna 2017, uye akashambira gumbo re butterfly kubatsira Great Britain kuti iwane goridhe mu4 x 100 metres medley relay pa2019 World Aquatics Championships. Guy ndiye akahwina muMitambo yeCommonwealth uye akava shasha dzomuEurope kanomwe mumakwikwi akasiyana-siyana.