Longtime NASA astronaut Mike Fincke is stepping away from his role at the space agency. The news comes months after he experienced a medical emergency aboard the International Space Station, which forced a premature end to the journey for him and three crewmates.

Fincke’s last day at the space agency is Wednesday, NASA said in a news release.

Although he is leaving NASA, Fincke said he remains “deeply committed to the work of exploration.”