Towards the end of the war Walendy was drafted first into the ''[[Reichsarbeitsdienst]]'' (auxiliary force), then as athe ''[[Luftwaffenhelfer]]'' ([[child soldier]] in the air force) and finally into the regular ''[[Wehrmacht]]'' (the German military). He completed his ''[[Abitur]]'' ([[secondary education]]) in 1946 and then went to [[journalism school]] in [[Aachen]]. From 1950 to 1956 he studied political science at the Hochschule für Politik in [[West Berlin]], where he received his diploma.
Afterwards he worked as the director of a "[[folk high school]]" in [[Herford]] and as the business leader of an employers' association in [[Bielefeld]]. In 1965 he went independent and founded the ''Verlag für Volkstum und Zeitgeschichtsforschung'' ("Publishing House for Folklore and Contemporary Historical Research") in [[Vlotho]]. (In 1999 ownership of the publishing house was transferred to his wife, since Walendy was barred from directing it due to his criminal convictions.) He maintains close contact with the Belgian revisionist organisation [[Vrij Historisch Onderzoek]] (VHO). He was imprisoned for 15 months for his writings denying the Holocaust and after his release from prison he was from 1997 state chairman of the far-right [[NPD]] party forin [[North Rhine-Westphalia]].
