Harry was the one who introduced him to Hermione. Practically bullied her into giving Draco a part time job at the local library even though Draco didn’t have a resume or a lick of experience. Draco found the job was less about booksmarts and more about being a sympathetic ear to the bunch of weirdos that hung out there. Draco discovered he quite enjoyed chatting to kooks about their problems and Harry was the one who suggested he look into becoming a social worker. Draco scoffed, but Harry was determined, helping Draco download the university application.