| Roles | Competed in Olympic Games |
|---|---|
| Sex | Male |
| Full name | Sebastián•Jahnsen Madico |
| Used name | Sebastián•Jahnsen |
| Born | 8 September 1990 in Miraflores, Lima (PER) |
| Measurements | 179 cm / 72 kg |
| Affiliations | G4S Teen |
| NOC |  Peru |
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 2012 Summer Olympics | Swimming (Aquatics) | PER |
Sebastián Jahnsen | |||
| 200 metres Freestyle, Men (Olympic) | =34 |
