Jock was a Scottish football player and manager. As a player he also represented Celtic, and was part of their side that won the Scottish league and Scottish Cup double in 1954.
He retired in 1957 and began his career as a Coach, or as said in Football a Manager, in 1960. In 1965 he returned to Celtic as manager and over 13 years led them to ten Scottish league championships including 9 in succession, eight Scottish Cups and six Scottish League Cups.
However, he is most famous as the first manager of any side from Great Britain to win the European Cup, with Celtic in 1967. He then went on to manage the Scottish national team from 1978 until his death in 1985.