| Roles | Competed in Olympic Games | |
|---|---|---|
| Sex | Male | |
| Full name | Jozef Franciscus Hendrikus•Klaassen | |
| Used name | Jozef•Klaassen | |
| Born | 5 March 1983 in Thames, Waikato |  NZL |
| Measurements | 199 cm / 96 kg | |
| Affiliations | Nereus — Amsterdam, Noord-Holland |  NED |
| NOC | Netherlands | NED |
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 2008 Summer Olympics | Rowing | NED |
Jozef Klaassen | |||
| Eights, Men (Olympic) | Netherlands | 4 | ||||
| 2012 Summer Olympics | Rowing | NED |
Jozef Klaassen | |||
| Eights, Men (Olympic) | Netherlands | 5 |
