Ar LI Ho Kin is a graduate of University of Manitoba, with a Bachelor of Environmental Studies (1977) and a Master of Architecture (1980). He worked in private practice before joining KCRC as in-house architect in 1984.
 
In 1987, Ar LI moved to Toronto and worked in private practice, while completing a part-time Master of Business Administration at the University of Toronto. Returning to Hong Kong in 1991, he worked briefly at the Buildings Department before joining the Architectural Services Department until his retirement in February 2013.
 
Ar LI has been a BEAM Pro since 2011. He joined the Professional Development Committee in 2012, and conducted presentations for BEAM Pro and BEAM Affiliate training sessions. He was elected as a Director of BEAM Society Limited in 2014 and became the Chairperson in 2022-2024.
 
He is also a Director of the Hong Kong Green Building Council (HKGBC); as well as Chairman of Green Labelling Committee, Member of the Finance & Executive Committee and Member of Infrastructure Rating System Committee of HKGBC.