Ir CHOI graduated from the University of Hong Kong with a Bachelor of Science in Engineering (Electrical) and a Master's Degree in Business Administration. He is a Chartered Engineer and a Fellow of The Hong Kong Institution of Engineers. Being a practitioner in utility operations and customer services for a long time, he has been actively involved in the improvement of green building environment. He has served the community in working out a number of programs driving for building energy efficiency, conservation, the use of renewable energy and electric vehicles for carbon reduction. These initiatives include designing and managing the Smart Power Building Fund, feed-in tariff and renewable energy certificate regimes, and other programs promoting smarter use of energy in both residential and non-residential sectors.
 
Raymond has also served as Member of the Appeal Board Panel under Electricity Ordinance (Chapter 406), the Electrical Safety Advisory Committee and the Steering Committee on the Promotion of Electric Vehicles. Raymond has been appointed as Elected Director of BEAM Society Limited since 2020 and is now serving the Financial Audit Committee and the Development Sub-committee.