 He continued to serve in the brigade's commanding positions, among others as a company commander during the First Lebanon War, where he was also wounded, as commander of the paratroopers' "Orev" company, commander of a battalion at the paratroopers regiment's commander's course, commander of the paratroop brigade training base and deputy brigade commander.Arieli took part in a course for brigade commanders as commander of the northern brigade in Gaza, with the rank of colonel.Served as Deputy Military Secretary to the Prime Minister and Minister of Defense (1997-1999), and headed the Administration for the Interim Agreement in the West Bank and as Head of the Administration for the Permanent Status Agreement.