At the 2015 IPC Athletics World Championships in Doha, Ballard won gold medals in the Women's 200m T53 in a championship record time of 29.33 and the Women's 400m T53. After winning the 400 m, Ballard said: "This is the one I wanted. I was so nervous coming in, you try and tell yourself that the worst thing that can happen is a loss and starting again tomorrow, but the reality is that this matters so much. I was so scared before the race, perhaps it gave me the adrenalin to get it done. I’ve just worked so hard for this for so long." She also won a bronze medal in the Women's 800 mm T54 behind gold medallist Madison de Rozario.