The CSB absorbed the Official Languages Agency (from 1 July 2003) and the Civil Service Training and Development Institute (from 1 April 2004).

[1] On 15 January 2021, the CSB announced that civil servants must either sign an oath or a declaration to pledge loyalty to the government.

[4] In July 2022, figures were released, showing the CSB had the highest amount of employee resignations since the 1997 handover across multiple pay levels, in addition to declining applications for open positions.

[6] In October 2022, Ingrid Yeung, head of the CSB, said that they would remove the requirement of "political neutrality" as one of the six core values in the Civil Service Code, a value which previously allowed non-high ranking civil servants to join any political party or take part in related activities if it does not raise a conflict of interest or bias.

[9] In October 2022, the head of the college, Oscar Kwok Yam-shu, said that some civil servants lacked a deep understanding of the country or national identity.