Sławosz Uznański

Sławosz Uznański was selected as an ESA reserve astronaut in 2022. Born in Poland in 1984, Sławosz is a scientist and engineer. Before his selection, he was working for the European Organization for Nuclear Research (CERN), where he oversaw the creation of a radiation-tolerant power converter control system which has been a core part of the Large Hadron Collider.

In his leisure time, Sławosz is outside testing his limits on high-altitude mountaineering expeditions, travelling to remote places or on a sailing boat, taking part in competitive regattas.

In September 2023, he started his training as a project astronaut at ESA’s European Astronaut Centre.