| Juander Santos | |
| Birth Date: | 7 May 1995 |
| Birth Place: | Bayaguana, Dominican Republic |
| Height: | 1.79 m[1] |
| Weight: | 53 kg |
| Sport: | Athletics |
| Event: | 400 m hurdles |
| Education: | Bayamón Central University[2] |
Juander Santos Aquino (born 7 May 1995 in Bayaguana) is a Dominican athlete specialising in the 400 metres and 400 metres hurdles. He has won several international medals, mainly in the relay.
He is the younger brother of 400m specialist and Olympic silver medalist, Luguelín Santos.
| Representing the | ||||||
|---|---|---|---|---|---|---|
| 2012 | CAC Junior Championships (U18) | San Salvador, El Salvador | 9th (h) | 400 m | 49.34 | |
| bgcolor=silver | 2nd | 4 × 100 m | 41.57 | |||
| 6th | 4 × 400 m | 3:17.78 | ||||
| 2014 | IAAF World Relays | Nassau, Bahamas | 11th (B) | 4 × 400 m | 3:03.41 | |
| World Junior Championships | Eugene, United States | 45th (h) | 200 m | 21.62 | ||
| 17th (sf) | 400 m | 47.64 | ||||
| Ibero-American Championships | São Paulo, Brazil | 6th | 400 m | 48.06 | ||
| bgcolor=gold | 1st | 4 × 400 m | 3:02.73 | |||
| Pan American Sports Festival | Mexico City, Mexico | 11th (h) | 200 m | 21.17 | ||
| 11th (h) | 400 m | 47.41 | ||||
| Central American and Caribbean Games | Xalapa, Mexico | 4th | 400 m | 45.93 | ||
| 4th | 4 × 400 m | 3:02.86 | ||||
| 2015 | IAAF World Relays | Nassau, Bahamas | 23rd (h) | 4 × 400 m | 3:12.55 | |
| Universiade | Gwangju, South Korea | 7th | 400 m hurdles | 50.34 | ||
| bgcolor=gold | 1st | 4 × 400 m | 3:05.05 | |||
| NACAC Championships | San José, Costa Rica | 8th | 400 m hurdles | 50.79 | ||
| World Championships | Beijing, China | 10th (h) | 4 × 400 m | 3:00.15 | ||
| 2016 | Ibero-American Championships | Rio de Janeiro, Brazil | 5th | 400 m hurdles | 49.73 | |
| NACAC U23 Championships | San Salvador, El Salvador | 3rd | 400 m hurdles | 50.02 | ||
| 4th | 4 × 100 m | 39.97 | ||||
| 2017 | World Championships | London, United Kingdom | 6th | 400 m hurdles | 49.04 | |
| Universiade | Taipei, Taiwan | bgcolor=gold | 1st | 400 m hurdles | 48.65 | |
| bgcolor=gold | 1st | 4 × 400 m | 3:04.34 | |||
| 2018 | World Indoor Championships | Birmingham, United Kingdom | 11th (sf) | 400 m | 46.83 | |
| 8th (h) | 4 × 400 m | 3:10.45 | ||||
| Central American and Caribbean Games | Barranquilla, Colombia | 3rd | 400 m hurdles | 48.77 | ||
| bgcolor=silver | 2nd | 4 × 400 m | 3:03.92 | |||
| 2019 | Pan American Games | Lima, Peru | 8th | 400 m hurdles | 2:09.37 | |
| 4th | 4 × 400 m | 3:05.64 | ||||
| 2022 | Ibero-American Championships | La Nucía, Spain | bgcolor=silver | 2nd | 400 m hurdles | 49.74 |
| Bolivarian Games | Valledupar, Colombia | bgcolor=gold | 1st | 400 m hurdles | 50.05 | |
| 3rd | 4 × 400 m | 3:08.11 | ||||
| World Championships | Eugene, United States | 35th (h) | 400 m hurdles | 58.80 | ||
| 2023 | Central American and Caribbean Games | San Salvador, El Salvador | 3rd | 400 m hurdles | 49.61 | |
| 3rd | 4 × 400 m | 3:02.19 | ||||
| Pan American Games | Santiago, Chile | 13th (h) | 400 m hurdles | 52.64 | ||
| 2024 | Ibero-American Championships | Cuiabá, Brazil | 5th | 400 m hurdles | 49.89 | |
| – | 4 × 400 m | DQ | ||||
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