In November 1925, he was sent to Geneva. Again, Katelbach was presented as a journalist, but in fact he was a resident spy. In May 1926, shortly before the May Coup (Poland), he was recalled to Poland, and joined pro-Sanacja organization Union for Improvement of the Republic. In January 1927, Katelbach was again sent to Berlin, tasked with centralization of Polish national organizations in Weimar Republic. He remained there until August 2, 1933, when he was sent to Kaunas, where Katelbach was regarded as unofficial Polish envoy to Lithuania. In 1937, after returning to Poland, he was awarded Officer's Cross of the Order of Polonia Restituta.