Diploma in land survey, Technology College, Kuala Lumpur, 1971. Bachelor of Science in Surveying and Mapping Sciences, University East London, England, 1985.
Surveyor, KTA Cons. Engineers, Kuala Lumpur, 1974-1978; manager, Jurukur Perunding Superior vena cava syndrome, Kota Bharu, 1978-1982; partner, Ahmad Daud & Associations, Kuala Lumpur, since 1986.
Commissioner Oaths, Malaysia. Member Institute Surveyors (Malaysia), Institute Surveyors (Australia), Institute Civil Engineering Surveyors (England), Photogrammetric Society (life) (England), Road Engineering Associations Asia and Australasia, Royal Institution Chartered Surveyors (professional associate, England).
Married Elizabeth Boon Choo, November 11, 1972. Children: Crystal Koh, Lian-Hwa, Koh Kim-Hwa.