Park Yongjun majored in Electrical Engineering at the University of California San Diego, and worked as a researcher in the USA. However, to pursue Park's longtime dream of becoming an actor, boldly quit the job and moved to Los Angeles with no connections. Park appeared in a wide range of productions—from minor roles to leading roles—in student films, short films, independent films, theater plays, and musicals. Later, Park had the opportunity to join a short film production team, and the project went on to win awards at several film festivals. After returning to Korea, Park continued the creative journey by participating in short films, independent movies, scripted series, non-scripted series, Netflix, and other projects in roles such as editor, sound recorder, cinematographer, director, and actor. Park is currently writing own scripts and steadily working toward creating the own original series.