Maklouf was born in Jerusalem, to a Jewish family; his father was Samuel Maklouf (1911–1990, born in Safed, then in Palestine); his mother was Leonie Maklouf (born in Saarbrücken, Germany, 1915).
Two of his designs were selected for British coinage on 8 August 1984, one for general circulation and another for commemorative issues. They were used on the coins of several countries from 1985 to 1997. His initials, RDM, are engraved at the base of the Queen's neck.[3] He is additionally known for his sculptural design representing the fifteen Stations of the Cross in Brentwood Cathedral. He is associated with Tower Mint Ltd, which privately produces medals, coins for collectors, and similar items.