Yim fenced (foil) in the late '80s in the NYC high-school fencing circuit. After graduation, he attended SUNY Stony Brook and fenced in their fencing club for a short period of time before transferring to Hofstra University, where he earned his bachelor's and master's degrees in business administration prior to embarking on a career at Canon USA. Currently, he owns a software company that supplies office equipment-related software to Canon and various office equipment dealers. He founded the Orlando Science High School Fencing team as a volunteer in September 2017 with 6 members training at the school gym. As the team grew, there was a need for a dedicated fencing facility/space and that inspired him to establish Orlando Fencing Academy—located near downtown Orlando—in September 2018.