Critics have described Sepp Hammer as delivering “masterful and expressive solos” (San Francisco Classical Voice) and showing “warm baritone gravity” (The Boston Globe). With California Bach Society, he has appeared as soloist in Bach’s St. Matthew Passion (as Jesus), Zelenka’s Missa Votiva, Charpentier’s Messe des Morts, and Carissimi’s Jonas, in which he portrayed the voice of God, “with booming authority” (San Francisco Classical Voice).

Sepp’s other concert engagements in recent seasons have included Bach’s cantata Aus der Tiefe with Santa Cruz Chorale, Handel’s Dixit Dominus with San Francisco Choral Society, Rutter’s Mass of the Children with Solano Symphony, Zelenka’s Gloria with Chora Nova, Vaughan Williams’ Five Mystical Songs with Contra Costa Chorale, and, with various ensembles, Schütz’s Symphoniae Sacrae, Bach’s Magnificat, Bach’s B Minor Mass, Haydn’s Lord Nelson Mass, Schubert’s Mass in G Major, Brahms’ Requiem, Fauré’s Requiem, Duruflé’s Requiem. With Philharmonia Baroque Orchestra, Sepp appeared in the role of Eupolemus in Handel’s Judas Maccabaeus and he sings regularly with the PBO Chorale.

On the opera stage, Sepp has appeared as Orest (Elektra) with Berkeley Elektra Project, Pistola (Falstaff) with Cinnabar Theater, the Speaker (Die Zauberflöte) with Pocket Opera, Malatesta (Don Pasquale) with North Bay Opera, and Wagner (Gounod’s Faust) with Opera San Jose. His other operatic repertoire encompasses a wide range of roles, including Aeneas (Dido and Aeneas), Conte Almaviva (Le Nozze di Figaro), the title role in Don Giovanni, Don Alfonso (Così fan tutte), Falke (Die Fledermaus), Escamillo (Carmen), Schaunard (La Bohème), and John Proctor (The Crucible).

Sepp holds a master’s degree in vocal performance from New England Conservatory and a bachelor’s degree in physics from the University of California, Berkeley.