Schreuder served as a captain in the Austrian Kaiser Infantry Regiment # 1 from 1790 to 1794. He served with his regiment in Dagobert Sigmund von Wurmser's Army of the Upper Rhine, fighting at Bad Bergzabern and Bienwaldmühle on 12 and 20 September 1793. He also fought at the First Battle of Wissembourg on 13 October 1793. Schreuder Jonkman was promoted to major and left the regiment 20 February 1794 to serve on the staff of General-Major Gerhard Rosselmini, the former commander of his regiment.