He works in sales at KACL and drives a '73 Dodge Polaris. From early in the series he is in love with Roz Doyle, who does not feel the same way about him (Roz was even willing to date a lesbian instead of him once). In the episode entitled 'Star Mitzvah' it is revealed that Shempsky is Jewish, and is fluent in Hebrew.
His claim to fame, as seen when he volunteers to be the station representative during contract negotiations, is that he can faint at will. It has also been mentioned in the episode "A New Position for Roz" that Noel has never missed a day of work. He was even retained by KACL when it changed formats to Salsa radio and fired most of the talk radio personnel, due to his mastery of Spanish and his never ever having a sick day. Noel shows attraction to Roz throughout the series leading to often embarrassing attempts to impress her. In the final episode, he finally kisses her after she becomes the station manager.