[2] His theatrical text Egon was published by Passagen Verlag in 2008 and was presented in the form of a scenic reading and performance at the Leopold Museum in Vienna.
In 2011 he won the Hans Gratzer grant with his play Allerwelt, with a world premiere at the Schauspielhaus in Vienna, where he was the in-house author in the 2013/14 season.
[3] From December 2013 to spring 2014, Projekttheater Vorarlberg put on a production of Weiss's Ein schöner Hase ist meistens der Einzellne, a play based on the real-life story of poet Ernst Herbeck (1920–1991) and artist August Walla (1936–2001), long-term schizophrenic artistic patients of the Gugging Mental Hospital near Vienna.
[4] In September 2018, Weiss published his critically acclaimed debut novel Am Weltenrand sitzen die Menschen at Suhrkamp Verlag (Berlin).
[8] In October 2019, his play Der letzte Mensch (The Last Man) premiered at Nestroyhof Hamakom, which deals with the future of mankind in various scenarios.