I am a native of Cambodia and continued my university studies and post-doctoral research in the USA in the 1960s. In 1972, I joined the CIBA-Geigy Agricultural Aviation Research Unit (a Swiss company's research unit at Cranfield Institute of Technology (C.I.T.) England) as a research scientist. While at C.I.T., I did a consulting research on cotton pest control in the Sudan Gezira for thirteen years, lectured at the FAO International Training Courses on Desert Locus Control in Nairobi, Kenya (1975) and in Karachi, Pakistan (1976), and supervised graduate students in Bio-aeronautics Department of C.I.T.In 1985, I moved to CIBA-Geigy International chemical company as a senior research biologist at its headquarters in Basel, Switzerland. During my scientific career, I had authored and co-authored 50 scientific papers that had been published in 12 scientific journals and 17 books and monographs.After my retirement in 1998, I took up my childhood interest in the ancient history of Cambodia which resulted in a published book (with the help of my wife - a native Chinese biologist): Zhou Daguan - A Record of Cambodia's Land & Customs.