Mohammed Nasif Kheirbek (Arabic: محمد ناصيف خيربك, 10 April 1937 – 28 June 2015) known as Mohammed Nasif or Abu Wael, was the former Deputy Vice-President for Security Affairs in Syria. He was a close adviser of Syrian President Bashar Assad and is Syria's point-man for its relationship with Iran and Lebanon's Shia militias. He is one of a number of officials that were sanctioned by the European Union for the use of violence against the civilian population during the Syrian civil war.