The son of one of the co-founders of the Wiener Sport-Club, Proksch took an active interest in both athletics and graphic design from an early age.
By the age of 17, Proksch was a champion pole vaulter and competed internationally, most notably placing 6th in the event at the 1936 Summer Olympics.
He attended boarding school with his four brothers and, by the age of 15, was already earning money as an illustrator under the pseudonym Fedor Broskow.
At the age of 17 he was the Vienna Youth Champion and over the course of his career he set the Austrian record in the pole vault eight times.
At the end of the war he hid in Waldviertel and Spitz, working low-key jobs as a graphic designer, before settling in Eichgraben in 1947.
Between 1994 and 2009 he won 14 gold medals, as well as one silver, in the World's Masters Championships, in the discus, shot put and javelin throw events.
[7] In 2009 he had cardiac surgery after a heart attack, as well as knee surgery, but nevertheless continued to participate in shot put events, winning gold medals in discus and shot put (with a distance of 2.8m) at the 2009 World's Masters Championships in Lahti as the only competitor in the 100+ age bracket.