He was for twenty-six years attached to the Jewish school of Strasbourg, of which he became the head.

In collaboration with Hirth, he compiled a Dictionnaire Général de Géographie Universelle (4 vols., Strasburg, 1839–41), for which Cuvier wrote a preface.

Soon afterward he published Le Sentier d'Israël, ou Bible des Jeunes Israélites (Paris, Metz, and Strasburg, 1843).

At the request of the Société des Bons Livres he took part in the editorship of Prières d'un Cœur Israélite, which appeared in 1848.

In 1849, despite anti-Jewish rioting in Alsace, Ennery was elected representative for the department of the Lower Rhine, and sat among the members of the "Mountain."