Back in Brussels, Van Maldere composed a number of operas and over 40 symphonies, ouvertures and sonatas. In 1758, he was promoted "valet de chambre" to the prince. From 1763 to 1767, he was co-director of the Grand Théâtre (Muntschouwburg, Théâtre de la Monnaie), a period which ended in a financial fiasco. Ignaz Vitzthumb (1724–1816) was the conductor of the Muntschouwburg in those years. Among van Maldere's students at the court chapel are the violinist Joseph Gehot (1756-na 1795) and the clarinettist Amand Vanderhagen (1753–1822). Van Maldere died in his home city of Brussels. After his decease, his brother succeeded him as first violinist of the court chapel.