Mohammed Nasif Kheirbek (Arabic: ???? ????? ??????) known as Mohammed Nasif or Abu Wael, (10 April 1937 – 28 June 2015) was the 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 sanctioned by the European Union for the use of violence against protesters participating in the Syrian Civil War.