Julian Bashir was a medical doctor and a former Starfleet chief medical officer. In 2369, Bashir was assigned to Deep Space 9. In 2374, Bashir was approached by Section 31, who attempted to recruit him.
In 2385, Bashir set out to find an solution to the Andorian reproductive crisis, which and he and his assembled team were later successful in accomplishing. As Bashir had accessed the forbidden Shedai meta-genome (provided by Section 31), he was court martialled and honorably discharged from Starfleet. .