Graduating with a BSc (Eng) in Computing Science from Imperial College London, Yong Sun subsequently joined global management and technology consulting firm Accenture, where he served for 25 years until 2009.

He was a partner in Accenture for 12 years and held many leadership roles including change management competency group lead for Asia, communications and high technology lead for Thailand, Malaysia, Philippines and Indonesia and the communications sector for Greater China. He has extensive experience in the media and communication industries, strategic information planning, complex systems implementation and business operations.

He is currently a Non-Executive Director of Rev Asia Berhad (formerly known as Catcha Media Berhad), Prosten Technology Holdings Limited, Hong Kong and Celcom Axiata Berhad. He also sits on the Development Board of Imperial College London.