Doerry was 21 years old when he competed at the 1896 Summer Olympics, there he entered three events, in the 100 metres he finished fifth in his heat, so he didn't qualify for the final. In the 400 metres, again he failed to finish in the top two in his heat so didn't qualify for the final, his final event was the 110 metres hurdles, and yet again he finished outside the top two and didn't progress to the final.