He began competing internationally at sixteen years old, running in the heats of the 800 metres at the 2005 World Youth Championships in Athletics. His first major senior tournament came the following year in the form of the 2006 Asian Games. Although he was eliminated in the heats of the 400 m, he won the gold medal in the 4×400 m relay with the Saudi team including Hamdan Odha Al-Bishi, Hamed Hamadan Al-Bishi and Mohammed Al-Salhi. Al-Sabiani secured a second relay gold at the 2007 Asian Athletics Championships and was the youngest athlete in the 400 m final, finishing in seventh. He was selected for the 2007 Pan Arab Games later in the year and broke 47 seconds for the first time with a personal best run of 46.99 sec in the heats. He also won another gold with the Saudi relay team.