Chandler Bing, one of the main characters in the popular TV sitcom "Friends", had indeed a few different career paths throughout the series. However, his professional life was mainly characterized by two roles. 1. IT procurements manager specializing in statistical analysis and data reconfiguration. (Season 1 - 9): This was Chandler's original job during most of the series. Many remember this job for the simple reason that no one among his friends really knew what he did. Hence, this led to a recurrent joke throughout the series. Despite Chandler's several explanations, his job remained a mystery for his friends and he was frequently depicted as deeply unsatisfied with what he was doing. 2. Junior Advertising Copywriter (Season 9 - 10): In the later stages of the series, Chandler quits his job in the IT sector to pursue a career in advertising. He first starts as an intern but later quickly makes his way up and becomes a Junior Advertising Copywriter, focusing on creating slogans and jingles for commercials. These are the two main jobs held by Chandler Bing throughout the series. The professional transition he made was a crucial plot point highlighting his character development from a discontented corporate worker to a more creatively fulfilled individual in the advertising field. This change was intended as a message that it's never too late to change one's career path toward something more fulfilling.