From 2012, Steiner served as the chairperson of industry organization Bundesverband Junger Unternehmer (BJU) [REF].
Between 2014 and 2015, Steiner appeared alongside Vural Öger, Jochen Schweizer, Frank Thelen and others in the first two seasons of Die Höhle der Löwen, a VOX reality television format featuring entrepreneurs pitching their business ideas in order to secure investment finance from a panel of venture capitalists.