| National: | Yes |
| Agencyname: | Chief Government Security Officer |
| Abbreviation: | CGSO |
| Logocaption: | Government of Malaysia |
| Motto: | Lindungi Aset Negara |
| Employees: | 379 (2018) |
| Budget: | MYR 23,672,100 (2018) |
| Country: | Malaysia |
| Governingbody: | Government of Malaysia |
| Governingbodyscnd: | Prime Minister's Department (Malaysia) |
| Headquarters: | Perdana Putra |
Malaysia Office of the Chief Government Security Officer (CGSO;) is a unit under the Prime Minister's Department of the Malaysian federal government. CGSO is tasked with developing and implementing security policies and procedures to protect government personnel, facilities, and assets from internal and external threats.
The Chief Government Security Officer (CGSO) was appointed on June 15, 1957, to be responsible to the Permanent Secretary of the Prime Minister's Department. The CGSO's terms of reference are set out in the Government Security Officer's Confidential General Circular No. 1, of 1958.
The CGSO's main task is to provide security advisory services to government agencies. This helps to protect against espionage, sabotage, and unauthorized information leakage. The CGSO's office was moved to the Ministry of Home Affairs in the early 1960s, but it was moved back to the Prime Minister's Department in 1977. The CGSO's office continues to execute its duties and responsibilities related to protection security as set by the government. [1]