The Chief of Defence Force is the head of the Singapore Armed Forces (SAF), who holds the rank of Lieutenant-General or Vice-Admiral. The Chief of Defence Force also serves as the aide-de-camp to the president of Singapore. The current Chief of Defence Force is Aaron Beng.

The Singapore Armed Forces (SAF) are the military of the Republic of Singapore, responsible for protecting and defending the security interests and the sovereignty of the country. A component of the Ministry of Defence (MINDEF), the armed forces have four service branches: the Army, Navy, Air Force, and Digital and Intelligence Service. An integrated force, it is one of the most capable, robust, technologically sophisticated and powerful militaries in the Southeast Asia region. The SAF is headed by the chief of defence force, appointed by the President, on the advice of the Cabinet.