Yoon Sang Choi is the CEO of Channel A B&C, an affiliate of Dong-A Media Group, specializing in media branding, design, and post-production. He began his career as a designer at SBS in 2004 and later served as a Brand Executive Producer at Channel A. Since the establishment of Channel A B&C in 2016, he has overseen a wide range of creative projects, including broadcast branding, content design, motion graphics, and post-production. Under his leadership, Channel A B&C has expanded its creative expertise beyond broadcast content into digital signage, media art, live performances, exhibitions, and brand promotions. The company's projects have been recognized by various international design awards, including the Asia Design Prize, K-Design Award, iF Design Award, and Red Dot Design Award.