| Roles | Competed in Olympic Games |
|---|---|
| Sex | Male |
| Full name | João•Siemsen |
| Used name | João•Siemsen |
| Born | 9 June 1992 in Rio de Janeiro, Rio de Janeiro (BRA) |
| Affiliations | Iate Clube do Rio de Janeiro, Rio de Janeiro (BRA) |
| NOC |  Brazil |
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 2024 Summer Olympics | Sailing | BRA |
João Siemsen | |||
| Multihull, Mixed (Olympic) | Marina Arndt | 9 |
