Channel News Asia | ST Engineering CEO on medical leave following stroke - Channel NewsAsia Channel News Asia Mr Tan Pheng Hock is on medical leave for about four weeks pending doctors' review, after he suffered a mild stroke. POSTED: 20 Jul 2015 08:13; UPDATED: 20 Jul 2015 09:59. PHOTOS. ST Engineering CEO Tan Pheng Hock. (Photo: ST Engineering). ST Engineering CEO Tan Pheng Hock on medical leave after mild stroke ... ST Engineering CEO on medical leave following stroke | TODAYonline ST Engineering chief executive Tan Pheng Hock on medical leave after mild ... |