After his return from the prison, Seeger completed a course for New Teachers. In 1946, he joined the SED and the Freie Deutsche Jugend. Between 1946 and 1952, he worked as a teacher in a village school. He was a literary editor at the Verlag Neues Leben in 1952/53 then a freelance writer in Stücken district of Michendorf near Potsdam. In 1954/55, he was a reporter in Vietnam then he was department manager to the secretary of the Schriftstellerverband of East Germany. He became a writer again in 1957.
In 1967, Seeger was incapable of writing for a long time because of a difficult accident. Since he already belonged to the SED's Bezirk of Potsdam leadership since 1964, he was a member of the SED's Central Committee from 1967. Between 1953 and 1972, he was an unofficial informer of the East GermanStasi.
Bernhard Seeger wrote reportages, narratives, novels and poems though best known for his radio and televised dramas. Seeger's party politic works dealt with the prominent problems of the building phase of the East German society, that of the East German critic highly praised work"Herbstrauch" about the collective farming of the East German agriculture in 1959/60 had strong influence of Sholokhov's "New Land under the Plough".
