Prof Yuen worked for GEC and Babcock & Wilcox in UK before returning to Hong Kong to lecture at the University of Hong Kong. He joined The Hong Kong University of Science and Technology (HKUST) as one of the founding members of the Department of Mechanical and Aerospace Engineering in 1992. He had served as the Associate Dean of Engineering, the founding Director of the CAD/CAM Facility and the founding Director of the EPACK Laboratory at HKUST. He was also the Director of the Technology Transfer Center at HKUST and Vice President of the HKUST R&D Corporation for the period 1998-2007. Prof Yuen was the Acting Vice-President of Research and Development, and President and CEO of HKUST R&D Corporation for the period 2009-2010. He is currently chairing the Board of Examiners of the Hong Kong Management Association Quality Award. He also serves on the Board of two Hong Kong listed companies as Independent Non-Executive Director.