Before his retirement from the civil service in October 2017, Shing Kwok was the Permanent Secretary of the then Ministry of the Environment and Water Resources (MEWR) for 5 years. He also served 7 years as the Permanent Secretary of the Ministry of Transport and 9 years as a senior official in the Ministry of Defence earlier in his career. During his military service, Shing Kwok held a variety of command and staff appointments in the Singapore Armed Forces (SAF). Promoted to Brigadier-General in 1996, he took early retirement from the SAF in 2000 to join the Singapore Administrative Service.
Shing Kwok obtained his Bachelor and Master’s degrees in Engineering Tripos from Cambridge University in 1981 and 1985 respectively. He also received a Master of Public Administration degree from Harvard University in 1994 as an Edward Mason Fellow.
During his public sector career, Shing Kwok was awarded the Public Administration Medal (Silver) in 1993 and the Meritorious Service Medal in 2000.
蔡先生于2017年10月从新加坡公共服务部门退休前，在环境与水源部（MEWR）担任常任秘书五年。早期，他曾担任交通部常任秘书七年，并在国防部担任高级职务九年。他在服役于新加坡武装部队（SAF）期间，担任过多个指挥和参谋职务， 并于 1996年晋升为准将，2000年， 他从武装部队提前退役，并加入了行政服务部门。
蔡先生拥有英国剑桥大学工程学学士（1981）及硕士（1985）学位。 1994年，他以爱德华·梅森学者的身份（Edward Mason Fellow）获得美国哈佛大学的公共行政硕士学位。
在公共服务部门任职期间，蔡先生曾于1993年荣获公共行政（银）奖章，并于2000年荣获功绩奖章。