He is noted for an extremely wide repertory which ranges from early music to the world premieres of several contemporary operas including Lowell Liebermann's The Picture of Dorian Gray, Philippe Manoury's K..., and Pascal Dusapin's Perelà, uomo di fumo.
He directed the choir of St. John the Baptist in Quincy, sang with Emmanuel Music, and appeared as a soloist with the Boston Symphony Orchestra in the Monteverdi Vespers, Bach's St. Matthew Passion and Tchaikovsky's opera Eugene Onegin.
Reinhart made his French operatic debut with the Atelier Lyrique de Tourcoing in 1981, when he sang the title role of Giovanni Paisiello's Le roi Théodore à Venise in its first performance in modern times.
Reinhart was guest artist with the Opéra de Paris in more than 200 performances, displaying his versatility there in works by Handel, Cimarosa, Berlioz, Rossini, Strauss, Hindemith, Janacek, Manoury, Henze, Fénelon, and Dusapin.
Notably, he was cast as Narbal and Panthée in Berlioz’s Les Troyens for the official opening of Paris’ Bastille Opera Theater in 1990.
He thus embarked upon an important chapter in that country which led to wide-ranging engagements including Hagen in Götterdämmerung, Osmin in Mozart’s Die Entfürung aus dem Serail, and the title role of Don Quichotte by Massenet.