He was a member of the QPR double winning side that captured both the Third Division Championship in 1966–67 and the League Cup on 4 March 1967.
A defender, Sibley was the youngest player to play in the QPR first team at the age of 15 on 3 September 1963 away to Aldershot in a League Cup tie.
He was appointed as manager of Walsall in February 1979 replacing Alan Ashman 1979.
He remained in charge for only two months before being replaced by Alan Buckley, who was returning to Walsall having been player–manager at Birmingham City.
This biographical article related to association football in England, about a defender born in the 1940s, is a stub.