Managing Director, Advanced Technovation Limited, Hong Kong (7/2020 - 7/2022) 

Assistant Secretary for Financial Services and the Treasury (Financial Services), Financial Services and the Treasury Bureau, Hong Kong Special Administrative Region Government (10/2002 - 7/2003) 

Chief Engineer, Binnie Black & Veatch Hong Kong Limited (now Black & Veatch Hong Kong Limited - A subsidiary of Black & Veatch, Overland Park, Kansas, U.S.A.) (1/2001 ‑ 9/2002)

Senior Engineer, Binnie Black & Veatch Hong Kong Limited (now Black & Veatch Hong Kong Limited - A subsidiary of Black & Veatch, Overland Park, Kansas, U.S.A.) (6/98 ‑ 12/2000)

Assistant Resident Engineer, Binnie & Partners (Hong Kong) (now Black & Veatch Hong Kong Limited - A subsidiary of Black & Veatch, Overland Park, Kansas, U.S.A.) (1/1984 ‑ 7/1984) 

Assistant Engineer, Binnie & Partners International, Hong Kong Office (now Black & Veatch Hong Kong Limited - A subsidiary of Black & Veatch, Overland Park, Kansas, U.S.A.) (7/1982 ‑ 12/1983) 

Summer Intern, Geotechnical Control Office, Public Works Department, Hong Kong Government (now Geotechnical Engineering Office, Civil Engineering & Development Department, Hong Kong SAR Government) (6/1981 ‑ 9/1981)

Summer Intern, T.H. Chuah & Associates Consulting Engineers, Singapore (7/1980 ‑ 9/1980)