Khwan worked for Bangkok Metropolitan Administration as a computer systems manager before becoming a UK Company Director. She graduated with a BSc degree from Chandrakasem Rajabhat University, Bangkok. A Fellow of the Royal Society of Arts, she is also a Fellow of the Royal Asiatic Society . She is the author of Soldiers of Siam and other academic work on Siam in Europe during the First World War. Khwan is an authority on HM King Chulalongkorn and HM King Vajiravudh in international relations. She has run Heritage Open Days events in England and Germany.