After his year of national service, Holzinger enrolled in the
University of Salzburg, originally reading
German studies. He had fallen in love with literature and language as an adolescent, spending long hours reading the classics and memorizing
Goethe's Faust, but was made to question his choice of career by endless and exhausting lectures on the analysis of
Biedermeier poetry. At the same time, he found himself impressed by
René Marcic, a legal philosopher lecturing on the importance of law for society. Holzinger abandoned German studies, switched to jurisprudence, and received a
doctorate of law in 1972. In 1975, Holzinger left Salzburg for
Vienna, joining the Constitutional Service in the
Chancellery, an office that assists ministries in drafting legislation and in evaluating the constitutionality of draft statutes drafted elsewhere. By 1984, he had risen to head of the Service. In 1992, he was granted the title of Head of Section (), the highest rank an Austrian civil servant can hold. When
Karl Korinek resigned the presidency of the Constitutional Court for health reasons in 2008, the
Gusenbauer government nominated Holzinger as Korinek's successor. President
Heinz Fischer affirmed the appointment without hesitation, effective from 1 May. Holzinger's appointment was uncontroversial. Having reached the mandatory retirement age of 70, Holzinger left the court on 31 December 2017. == Politics ==