Mohammad Bagher Zolghadr has been appointed as the secretary of Iran's Supreme National Security Council on Tuesday after Ali Larijani was killed in a strike last week.
Zolghadr was a former Iranian Revolutionary Guard commander. He had been serving as the secretary of Iran's Expediency Council.
The killing of the late Khamenei's main adviser, Ali Larijani, was a real blow to the ruling authorities given his extensive experience, his ability to operate between Iran's different power centres and his skills negotiating with the outside world.