From 1907, Theyer travelled around the world as a newsreel cameraman for Pathé.
Theyer’s work took him as far as China, Alaska, the South Sea Islands, Africa and the Middle East.
In January 1914, Theyer was employed as a cinematographer for the German Messter film studio.
Parts of this footage have been located in the film archives of the Library of Congress by film historians Ron van Dopperen and Cooper C. Graham while researching their book American Cinematographers in the Great War.
[1] In 1916, Theyer returned to Vienna and joined producer Alexander Kolowrat who had set up film propaganda productions for the Austrian war effort.