Tirmont first took private lessons with Rose Caron, and then studied at the Paris conservatory with Léon
Melchissedec and Georges Imbart de la Tour. He soon appeared in minor roles both
in opera and operetta, and first appeared in a main role in November 1910 as Méhul's Joseph at the
Opéra-Comique.
The next few years, he had brilliant success both in opera and operetta: Lakmé, Madama Butterfly,
Mignon, La fille de Madame Angot and Beppe in Pagliacci at the Opéra-Comique; Le chemineau (by Xavier Leroux) at the
Gaîté-Lyrique, Boris Godunov at the Champs-Élysées (I suppose as Shujskij), The Quaker girl (an
operetta by Lionel Monckton) in Lyon, Die keusche Susanne (by Gilbert) at the Apollo.
The First World War was a break for his career, from which he never fully recovered. After the war, he seems to have sung operetta
only, still with good success, but mostly in minor theaters like the Gaîté-Lyrique, the Bouffes-Parisiens, or in
Tours. His career lasted through the mid-1930s; after retiring from the stage, he managed the theater in Saint-Quentin.
References: 1 (where also
the picture has been taken from), 2,
3