[1] After returning from captivity, he initially worked as a coachman on the estate of the von Itzenplitz family in 1945 and became the chairman of the Anti-Fascist Youth Committee in Grieben.

[1] In 1950, he additionally became a member of the federal executive board of the Free German Trade Union Federation (FDGB) (until 1955) and later that year was made a member of the first Volkskammer, nominally representing rural constituencies, first southwestern Bezirk Schwerin,[3] then southern Bezirk Magdeburg.

He attended the SED State Party School in Ballenstedt in 1951, after which he was made head of the Bezirk Magdeburg Machine-Tractor Stations (MTS) Administration.

[1] From 1953 to 1957, he pursued distance education at the German Academy of Political Science and Law "Walter Ulbricht" in Potsdam-Babelsberg, de facto a Marxist-Leninist cadre factory of the ruling SED,[5] and the Institute for Agricultural Economics in Bernburg, graduating as an agricultural economist (Dipl.

[1] Kiesler was awarded the Patriotic Order of Merit in Silver in 1963 and 1965 and in Gold in 1985, the Banner of Labor twice as well as the Hero of Labour title in 1974.

[1][9] In November 1981, he was removed as head of the Agricultural Department due to conflicts with the SED's economic policies and was succeeded by Bruno Lietz.

He was initially given a job in 1981 at the Academy of Agricultural Sciences as director of the newly established project technology institute for rational energy use.

In 1982, he was transferred to a politically irrelevant position at the League for Peoples' Friendship of the GDR, a SED-controlled mass organization, initially as secretary, additionally chairing the organisation's Audit Commission from 1986.