Jessamin was a final-year cadet at Starfleet Academy in the 2350s.
Jessamin studied Advanced Security Techniques in the same class as Tasha Yar circa 2358. Jessamin had also practiced ballet since childhood, which instilled discipline and grace in Jessamin.
Commander Darryl Adin mentioned this to Yar as an example of the usefulness of knowing the talents of one's teammates. (TNG novel: Survivors)