| Link | Location | |
|---|---|---|
 | Greg Sicher | Edina, Minnesota, United States |
| Kavitha Siddada | Bangalore, India |
| Raman Sidhu | Hyderabad, India |
| Łukasz Sidorkiewicz | Wrocław, Poland |
| Svitlana Sidorova | Kyiv, Ukraine |
 | Robert Siegl | Munich, Germany |
| Marleen Siemensma | Amsterdam, Netherlands |
| Marcin Sierakowski | Warsaw, Poland |
| Michael Sieron | Zurich, Switzerland |
| Patria Chong Siew Chyi | Singapore, Singapore |
| Karen Skadsheim Sikkeland | Oslo, Norway |
 | Michał Siklucki | Kraków, Poland |
| Kamil Sikora | Warsaw, Poland |
| Tanmoy Sil | Dublin/London, Ireland |
 | Ilia Silinevich | Astana, Kazakhstan |
