Never renouncing Nazi ideology, she consistently fought to defend her father's reputation and became closely involved in neo-Nazi groups that gave support to ex-members of the SS.

She was the only biological and legitimate child[3] of Himmler and his wife Margarete Siegroth, née Boden,[4] though her parents later adopted a son named Gerhard von der Ahé.

[14] From 1961 to 1963, she worked, under an assumed name, as a secretary for West Germany's Bundesnachrichtendienst, the Federal Intelligence Service (BND), at its headquarters in Pullach, near Munich.

[10][15] At the time the agency was headed by Reinhard Gehlen, an American-recruited general who hired, among others, ex-Nazis to work for BND based on their connections and experience with Eastern Europe and anti-communist activities.

[2][16] For decades Burwitz was a prominent public figure in Stille Hilfe für Kriegsgefangene und Internierte (Silent Assistance for Prisoners of War and Interned Persons), who provided legal and financial support to former SS members from its founding in 1951.

[19] Peter Finkelgrun, a German-Jewish investigative journalist, discovered that Burwitz provided financial support for SS-Scharführer Anton Malloth, a former Nazi prison guard and a fugitive war criminal.