Dahan enlisted in the IDF in 1998 and completed the Armored Corps tank commanders and officers courses. He served as a platoon commander and later as commander of "Pluga B" in the 52nd Battalion.[1] He led the unit during Operation Cast Lead, during which he was wounded.[2] Afterward, he served as deputy commander of the 9th Battalion.
In June 2014, Dahan was promoted to the rank of lieutenant colonel and appointed commander of the 52nd Battalion, leading it among other engagements during Operation Protective Edge. For its performance in the operation, the battalion received the Aluf Commendation.[3] In 2016, he was appointed operations officer of the Judea and Samaria Division.
In July 2018, Dahan was appointed commander of the Samaria Brigade,[4] a position he held until 2020.[5]
In July 2021, he was appointed commander of the 460th Armored Training Brigade,[6] a role he completed in May 2023.
On 1 May 2023, Dahan was promoted to brigadier general, and on 17 May 2023 assumed the position of Chief of Staff of the Northern Command. He served in this role during the Iron Swords War and Operation Northern Arrows.
In November 2024, IDF chief of staff Herzi Halevi announced that Dahan would replace Itzik Cohen as commander of the 162nd Division.[7]
On 6 April 2025, he officially assumed command of the division.[8]