Between 1930 and 1932, she lived in Zurich, Switzerland, working for R. Rosendorf, a lawyer [1] and as a language teacher and freelance translator in the area of business law.

In 1933, she studied briefly at the London School of Economics and made arrangements in preparation for Mannheim's escape from Germany.

[3] In acts of civil disobedience working to convince others to oppose the Nazis, Kuckhoff held lectures and wrote articles analyzing politics and the economy.

[1][2] In fact she joined the KPD/SED after World War II and her move to east Berlin to facilitate a life in the nascent GDR.

[1] On 3 February 1943, she was sentenced to death as an "accomplice to high treason and [for] failure to report a case of espionage".

A few months later, however, in a second trial on 27 September 1943, her civil rights were revoked for "abetting the progress of an organization of high treason and encouraging the enemy".

[3] In 1945, Greta Kuckhoff re-joined the KPD[note 2] and in May 1945, was appointed the leader of the postwar reconstruction Bureau of Denazified and Abandoned Factories (Amtsstelle für die entnazifizierten und herrenlosen Betriebe) in Berlin.

[2] In April 1946, she became a member of the Socialist Unity Party (Sozialistische Einheitspartei Deutschlands, or SED) when the KPD leadership forced a merger with the East German Social Democrats.

She,[10] Adolf Grimme and Günther Weisenborn attempted to gain legal redress against the former Nazi judge who had convicted them all, Manfred Roeder.

There are streets in Berlin,[12] Leipzig, Aachen and Lützen named Kuckhoffstraße, after Greta and Adam Kuckhoff.