Horb was a sergeant in Suriname. In 1979, he asked Dési Bouterse to be chairman of a new military union, and to take the lead in an execute coup. On 25 February 1980, Bouterse, Horb and fourteen other sergeants overthrew the Henck Arron government with a violent military coup d'état, now known as the Sergeants Coup. Horb became the second-in-command. After the coup, he became a member of the National Military Council of Suriname.