Kreitzberg served as the Estonian Minister of Culture and Education from April to November 1995.

[1] Kreitzberg next served as the deputy mayor of Tallinn, the Estonian capital, from 1996 to 1999.

[1] Kreitzberg served as the deputy chairman of the Riigikogu for two different tenures, from 2001 to 2003 and again from 2003 to 2005.

[1] He was accompanied by three other parliamentarians in the delegation — Kalev Kallo, Maret Maripuu and Sven Sester.

Kreitzberg died in his Chinese hotel during the official visit on 3 November 2011, at the age of 62.