After retiring form playing, Popovics coached Dutch amateur clubs Quick (1970–1971), MVV '27 (1971–1972), RFC Rotterdam (1972–1974), Overmaas (1974-1976), Unitas (1976–1977), Xerxes (1977–1978) and Barendrecht (1978–1980).

Back in the Netherlands he continued coaching professional teams De Graafschap (1983–1985),[2] NEC Nijmegen (1985–1987), Cambuur (1988–1990),[3] Excelsior Rotterdam (1990–1992), FC Eindhoven (1993–1994) and RBC Roosendaal (July 2010).

[4][5] He also managed Hungarian club MTK Budapest twice and Belgian side Verbroedering Geel, succeeding Dimitri Mbuyu.

[6] Sándor Popovics held the position of general manager at ADO Den Haag[7] and was named head scout at NAC in February 2002[8] He became a naturalized Dutch citizen in 1970.

[9] Popovics was married to Corrie, the ex-wife of Theo Laseroms,[10] and was father-in-law of former NEC Nijmegen and Hungary goalkeeper Gábor Babos.