 Todor Marev was selected for the Bulgarian A team by manager Stoyan Ormandzhiev and made his debut in Genoa on 22 December 1974 in a friendly against Italy (0-0).He made a total of 16 appearances, the last one being a match against Switzerland, played in Varna on 9 March 1983 (1-1).Marev graduated from the University of Economics (Varna) in 1983 and also took a course in the National Sports academy (Sofia), receiving a coaching degree in 1995.