[1] From 1947 he was working as a journalist, specialising from 1950 in cultural criticism for Die Furche, a conservative-leaning Austrian weekly newspaper.

In 1967 he was appointed culture editor and Programme Planner for the ORF, Austria's national television broadcaster by Bacher, where he also contributed as a script-writer to programmes such as the Familie Leitner (Leitner Family) series and, in 1968, Die Donaugeschichten (The Danube Stories; the Austrian Publicity museum, Österreichischen Werbemuseum, holds a single episode of this 25-minute-long early evening classic series, both scripted and produced by Mauthe, and featuring among others Theo Lingen, Willy Millowitsch, Erich Padalewski and Walter Nießner).

The return of the "Altwiener Christkindlmarkt" to the city's Freyung square, a Christmas Market inspired by the example of its eighteenth-century precursor, can be traced back to an idea from Jörg Mauthe.

[2] During the 1984 Occupation of the Hainburger Au Mauthe, already recognized for his environmentalist credentials, sided with the occupiers who were opposing the proposed construction of a hydro-electric power plant, expected to destroy a large area of environmentally sensitive wetlands.

In 1975 Mauthe purchased the Burgruine Mollenburg, a small ruined castle near Weiten in Austria's Waldviertel region.