@Alvin_sak Sir Alex Ferguson managed Scotland through the end of the qualifying campaign for the 1986 FIFA World Cup and the finals after the untimely death of Jock Stein. He was also managing Aberdeen in the Scottish League at the same time. Dick Advocaat too, albeit only for a short while. He managed Belgium and AZ from December 2009 to April 2010. Guss Hiddink managed PSV and Australia at the same time as well as Chelsea and Russia later on. There are quite few others as well..