David Saint-Jacques (in Quebec: [dav?d s???~n?ã(?)k?], French pronunciation: ?[david s?~?ak]; born January 6, 1970) is a Canadian astronaut with the Canadian Space Agency (CSA).
He is also an astrophysicist, engineer, and a physician.
In December 2018 he launched to the International Space Station, as Flight Engineer on Expeditions 57, 58 and 59; he returned to Earth on June 25, 2019.