Doctor Vassbinder was a professor at Starfleet Academy during the 2340s, at which time, Chakotay failed his course in temporal mechanics. (VOY: "Year of Hell, Part I")
Vassbinder also lectured at the physiognomy workshop during a 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. (TNG: "Timescape")
In 2370, Vassbinder published some new theories on warp propulsion inter-relays, which Wesley Crusher used to discredit Geordi LaForge's work on a new plasma-dyne relay for the Enterprise warp core. (TNG: "Journey's End")