In accordance with his father's wishes, and following in the footsteps of his grandfather, King Talal, his father King Hussein, his eldest brother, King Abdullah II, and other members of the Royal Family, Prince Hamzah enrolled in the Royal Military Academy Sandhurst, UK, in January 1999.

Training at RMA Sandhurst is a one-year course for officers, and all British Commissioned Officers must graduate from Sandhurst. Prince Hamzah completed the program in December 1999, "passing-out" as a commissioned officer in the Jordan Arab Army. At Sandhurst, he was awarded the Overseas Sword, presented by the Commandant to the best performing overseas cadet, as well as The Prince Saud Abdullah Prize, which is awarded to the overseas cadet who has earned the highest aggregate mark in academic subjects.

For his specialized training, Prince Hamzah chose the armored branch, and, after completing officer training in the summer of 2000, he took advanced parachuting courses in Jordan, before returning to Europe to participate in field exercises for armored troop leaders.