Later Brahms recommended Thieriot for the position of Artistic Director of the Styrian Music Association in Graz (1870–1885).
The composer always received high praise in concert reviews: "[…] and met with a warm and friendly reception by the audience and deservedly so.
[…] Excellent work, clarity and good taste regarding the instrumentation; employment of dignified motives full of character […] Enrichment of the concert repertoire".
Thieriot's chamber music constitutes a great part of his total output and is judged to be among his finest compositions.
62 for 2 violins, viola, cello, bass, clarinet, horn, and bassoon) a quartet for flute and string trio Op.