 He remained there until 1852, when Samuel Holdheim, who took a great interest in him, recommended him to Waren in Mecklenburg as teacher and preacher.The Orthodox reaction introduced by the "Landrabbiner" Baruch Isaac Lipschütz in 1853 forced Mielziner, much to the regret of his congregation, to resign his position.He then went to Denmark, where his brother Solomon was minister in Aalborg, and soon obtained a position at Randers in 1854.