Rachel inadvertently kisses him during her job interview but still gets hired. He seems very timid and serious about his job at Ralph Lauren.
He also has a son, Ross Zelner, who is interested in dinosaurs, which Ross Geller uses as an avenue to convince him to offer Rachel her job back when she's fired after being caught interviewing for a job with Gucci. He also thinks that Ross' (Geller) name is "Ron" and the latter doesn't correct him.
- In "The One Where Rachel Goes Back To Work", he says that he would follow Ralph Lauren "into hell" before whispering "Microphones..." to Gavin Mitchell.
- He has the same initials (R.Z.) as his son.