Presently, Choon San Yeoh occupies the position of Executive Chairman of Bermaz Auto Bhd. Mr. Yeoh is also Member of The Institute of the Motor Industry and on the board of 12 other companies.

In his past career he was Divisional Manager-Technical Services at Borneo Motors Sdn. Bhd., Managing Director at Sime Darby Hyundai Sdn. Bhd., Chief Operating Officer & Executive Director at Proton Corp. Sdn. Bhd., GM-Business Operation & International Export at Perusahaan Otomobil Nasional Sdn. Bhd. and Divisional Manager at Daihatsu (Malaysia) Sdn. Bhd.