| Post: | Chief |
| Body: | Staff |
| Flagcaption: | Flag of the Barbados Defence Force |
| Incumbent: | Commodore Errington Shurland |
| Incumbentsince: | 1 September 2021 |
| Department: | Headquarters Barbados Defence Force |
| Abbreviation: | COS |
| Reports To: | President Prime Minister |
| Residence: | St. Ann's Fort The Garrison |
| Formation: | 15 August 1979 |
| First: | Colonel Leonard Banfield |
| Deputy: | Deputy Chief of Staff |
The Chief of Staff (COS) is the professional head of the Barbados Defence Force and the most senior uniformed military adviser to the Prime Minister of Barbados (Chairman of the Defence Board and Minister of National Security). The office of the (COS) is responsible for the administrative and operational control of the Barbados Armed Forces and is based at St. Ann's Fort The Garrison, Saint Michael.