He was appointed by the Mannheim court in 1741 or 1742. Most likely, his engagement there resulted from contacts made during the Bohemian campaign and coronation of Carl Albert (Karl VII) of Bavaria, a close ally of the Elector Palatine. In January 1742, Stamitz performed before the Mannheim court as part of the festivities surrounding the marriage of Karl Theodor, who succeeded his uncle Karl Philipp as Elector Palatine less than a year later; Carl Albert was among the wedding guests.