| World Championship 2019 Doha | 20km Walk (Men) | 1:37:33 | 31 | IRL | 2019-10-04 00:00:00 | FINAL | | |
| European Championship 2018 Berlin | 20km Walk (Men) | 1:22:18 | 10 | IRL | 2018-08-11 00:00:00 | FINAL | | SB |
| World Championship 2017 London | 20km Walk (Men) | DQ | | IRL | 2017-08-13 00:00:00 | FINAL | 0 | |
| Olympic Games 2016 Rio | 20km Walk (Men) | 1:25:25 | 46 | IRL | 2016-08-13 00:00:00 | FINAL | 1091 | |
| World Championship 2015 Beijing | 20km Walk (Men) | DQ | | IRL | 2015-08-23 00:00:00 | FINAL | 0 | |
| Olympic Games 2020 Tokyo | 50km Walk (Men) | 4:06:20 | 29 | IRL | 2021-08-06 00:00:00 | FINAL | | SB |
| Olympic Games 2016 Rio | 50km Walk (Men) | DNF | | IRL | 2016-08-19 00:00:00 | FINAL | 0 | |
| World Championship 2015 Beijing | 50km Walk (Men) | DNF | | IRL | 2015-08-29 00:00:00 | FINAL | 0 | |