Doctor Vassbinder was a professor at Starfleet Academy during the 2340s.
During his time as Starfleet Academy, Chakotay failed Professor Vassbinder's course in temporal mechanics. (VOY: "Year of Hell")
Vassbinder also lectured at the physiognomy workshop during a psychological conference on the effects on deep space assignments in 2369 where he mistakenly gave an hour-long dissertation on the ionization effect of warp nacelles where the topic in question was supposed to be psychology. Captain Picard stated, "He just kept talking in one long incredibly unbroken sentence moving from topic to topic so that no-one had a chance to interrupt; it was really quite hypnotic." (TNG: "Timescape")
In 2370, Vassbinder published some new theories on warp propulsion inter-relays, which Wesley Crusher used to discredit Geordi La Forge's work on a new plasma-dyne relay for the USS Enterprise-D's warp core. (TNG: "Journey's End")