| Roles | Competed in Olympic Games |
|---|---|
| Sex | Male |
| Full name | Colm•O'Brien |
| Used name | Colm•O'Brien |
| Born | 4 April 1947 in Wicklow, Wicklow (IRL) |
| Measurements | 177 cm / 73 kg |
| NOC | Ireland |
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1968 Summer Olympics | Fencing | IRL |
Colm O'Brien | |||
| Foil, Team, Men (Olympic) | Ireland | 17 | ||||
| Épée, Individual, Men (Olympic) | 6 p5 r2/4 | |||||
| Épée, Team, Men (Olympic) | Ireland | 18 | ||||
| Sabre, Individual, Men (Olympic) | 6 p1 r1/4 | |||||
| Sabre, Team, Men (Olympic) | Ireland | 12 |