Henschke remained politically active even after German reunification, serving on the Frankfurt (Oder) City Council and being elected to the Landtag of Brandenburg.

Henschke completed a vocational training with Abitur (university entrance qualification) from 1968 to 1971 to become a BMSR mechanic at the Eisenhüttenkombinat Ost in Eisenhüttenstadt.

[1][2][3] In 1971, he committed in writing to a ten-year tenure as a full-time employee of the Ministry for State Security (MfS) in Bezirk Frankfurt (Oder).

There, as a career officer, he was responsible, among other tasks, for guarding GDR deserters in the Frankfurt (Oder) Stasi prison.

Since the prospect of a university placement was a significant reason for Henschke's commitment to full-time work with the Stasi, he requested in writing to be released from his duties.

On 29 March 1978, Henschke signed a handwritten commitment to work with the Stasi as a GMS under the code name "Ingo Köhler.

[1] As FDJ First Secretary, he served as statutory member of the Bezirk Frankfurt (Oder) SED Secretariat, which again meant the end of his Stasi collaboration.

[1] After the fall of the Berlin Wall and the Peaceful Revolution in the DDR, Henschke initially worked as a managing director of a GBT GmbH at the semiconductor plant in 1990, before becoming unemployed that same year.

[1][3] In 2002, Henschke unsuccessfully ran for mayor as the candidate of the electoral alliance "Group 2002" in Frankfurt (Oder),[1][7][9] narrowly losing to Martin Patzelt of the Christian Democratic Union (CDU).