He made his opera debut there in 1845 and then pursued further voice studies at the Conservatoire de Paris from 1846–1848.
He created roles in several world premieres with that company, including Philippe d'Autriche in Louis Clapisson's Jeanne la folle (1848), Jonas in Giacomo Meyerbeer's Le prophète (1849), Phaon in Charles Gounod's Sapho (1851),[2][3] Rodolphe in Armand Limnander's Le maître chanteur (1853), Rodolphe in Gounod's La nonne sanglante (1854), Henri in Giuseppe Verdi's Les vêpres siciliennes (1855), Fromental Halévy's La magicienne (1858), Julien de Médicis in Józef Michał Poniatowski's Pierre de Médicis (1860), Adoniram in Gounod's La reine de Saba (1862), and Roland in Auguste Mermet's Roland à Roncevaux (1864).
[2] On the international stage Guéymard was a guest artist at the Royal Opera House in London in 1854.
Other roles in Guéymard's repertoire included Arnold in William Tell, Jean de Leyde in Le prophète, both Manrico and Ruiz in Il trovatore, Rodolfo in Luisa Miller, Tebaldo in I Capuleti e i Montecchi, and the title role in Robert le diable.
[2] Guéymard married Belgian opera singer Pauline Guéymard-Lauters in 1858,[4] but the marriage ended in divorce in 1868.