[4] Throughout his career, he was sent to several training institutes, which include the Initial Officer Training (IOT)[4] and Basic Flying Training (BFT) at the Royal Air Force College Cranwell near Cranwell in Lincolnshire, England in 1989;[3] the Advanced Flying Training (AFT) at RAF Valley, Isle of Anglesey, North Wales in 1990;[3] Tactical Weapon Unit (TWU) at RAF Chivenor in Devon, England from 1990 to 1991;[3] Qualified Flying Instructor (QFI) course at RAF Topcliffe and RAF Linton-on-Ouse in Yorkshire, England in 1997;[3] 6th Advanced Command and Staff Course (ACSC) at Joint Services Command and Staff College in Oxfordshire, England;[3] and graduated from King's College London with Master of Arts (MA) in 2002;[3] attended National Defence College (NDC) at New Delhi in India; and graduated from University of Madras, the Master of Philosophy (MPhil) with First Class in Defence and Strategic Studies in 2010.

[3][5] On 12 September 1988, Hamzah enlisted in the Royal Brunei Armed Forces (RBAF) and subsequently graduated with the rank of second lieutenant on 27 July 1989.

[3] He held another important position as the Chief of Staff (COS) of Joint Force Headquarters (JFHQ) from 2010 to 2012, before being assigned to the role of Deputy Commander of the RBAirF.

[9] The handover ceremony between Hamzah and Mohammad Sharif was held at Royal Brunei Air Force Base, Rimba, in Bandar Seri Begawan on 28 August 2020.

[11][12] Hamzah is married to Hajah Anita Binurul Zahrina,[13] daughter of Pehin Dato Abdul Aziz, and together they have two children.