Ce métier n’existe plus de nos jours. Auparavant cette personne était appelée « Receveur. »

In a bus today, the only person that will sell a ticket to you is the bus driver, whose job has for title “conducteur / conductrice d’autobus”.

I hope you are not taking “ticket” in French as meaning “procès verbal”, “contravention” or equivalently, “amende”: this meaning of “ticket”» does not exist in French. The name of the job of those latter empoyees is “contrôlleur/contrôleuse de transport en commun”, which can be shortened into “contrôleur de transport” and simply “contrôleur/contrôleuse”.