David Saint-Jacques, OC, OQ, astronaut, engineer, astrophysicist, medical doctor (born 6 January 1970, in Québec City, QC). Early in his career, Saint-Jacques contributed to advances in telescope technology in Japan and Hawaii, and medical technology at Lariboisière Hospital in Paris. (See also Astronomy; Medical Research; Technology in Canada.) He also worked as a doctor and co-chief of medicine at the Inuulitsivik Health Centre in Puvirnituq, Nunavik. In 2009, he was chosen by the Canadian Space Agency to become an astronaut. In 2018, he served on the International Space Station for 204 days, longer than any other Canadian astronaut.