The club was formed as Standard Telephones & Cables (S.T.C.) in 1964 by workers in the company's factory in Monkstown.H. Johnstone & G. Hamilton (n.d.) A Memorable Milestone: 75 Years of the Northern Amateur Football League, p. 211 The factory had only recently opened and the workers decided to form a team which they could enter in the junior ranks of Northern Irish football. In the early 1970s however the club experienced growth and, after winning the Division 2A title, were promoted to the intermediate tier. This occurred in 1970 and marked the beginning of a decade of growth for the club. The 1973–74 season saw them win promotion to the top tier of the league and they competed the double that year by winning the Clarence Cup, a knockout tournament for Amateur League sides. The club were relegated to Division 1B in 1980–81 but kept faith in long-serving manager Barry McClung who led them to immediate promotion before in 1982–83 winning the overall Amateur League title, as well as victory in the Border Cup (a knockout competition for First Division teams only) and a semi-final place in the Steel & Sons Cup. However McClung left in late 1984 with former Crusaders F.C. goalkeeper Roy McDonald taking over as manager.SJ Shaw, "History of STC FC", Inverview: The Official Programme of Larne Football Club - Larne v S.T.C., 19 January 1985
