Maestro Tweten has enjoyed a long relationship with Utah Opera/Symphony where he has conducted eighteen productions. Other top American collaborations include the Lyric Opera of Chicago, where he served for many seasons as an Assistant Conductor and recently conducted Turandot, Florentine Opera, Opera San Antonio, Kentucky Opera, Dayton Opera, Austin Lyric Opera, Tulsa Opera, Opera Birmingham, Opera Southwest, Madison Opera, El Paso Opera, and Sarasota Opera. Tweten has conducted extensively in his native Canada, with productions including: Calgary Opera (Die Zauberflöte, Le nozze di Figaro, Pagliacci/Gianni Schicchi, Il barbiere di Siviglia, L’italiana in Algeri, Rigoletto, and Otello), Vancouver Opera (Tosca and Il barbiere di Siviglia), Edmonton Opera (Lucia di Lammermoor, Rigoletto, Madama Butterfly and Fidelio), Don Giovanni with Opera Ontario, The Gondoliers with UBC Opera, and L’isola disabitata with the Canadian Opera Company. Tweten’s orchestral work includes a number of performances with the New Mexico Philharmonic, the Santa Fe Pro Musica Orchestra, and the Santa Fe Symphony, as well as the Fresno and San Diego Symphonies.

After working at the Banff Center of Fine Arts, he joined the Houston Grand Opera Studio where he was on the team for the world premiere performances of the Emmy award-winning Nixon in China, and later served as a vocal coach and assistant conductor for the Canadian Opera Company and Lyric Opera of Chicago. 

Equally at home as a recitalist, collaborator, and chamber musician, he has performed with many of the industry’s most prominent singers and instrumentalists including Lorraine Hunt Lieberson, Ailyn Pérez, Joshua Hopkins, Elizabeth Futral, Catherine Malfitano, Joyce DiDonato, Samuel Ramey, Thomas Hampson, Rod Gilfry, Suzanne Mentzer, Rachel Barton Pine, the Taos Chamber Music Group, and the St. Lawrence Quartet in venues such as Alice Tully Hall, Chicago’s Orchestra Hall, the Santa Fe Chamber Music Festival, Los Angeles’ Disney Hall, Barcelona’s Gran Teatre del Liceu, Vienna’s Konzerthaus, London’s Wigmore Hall, and the Salzburg Festival. 

Robert serves as Music Director of the Sag Harbor Song Festival, which was inaugurated in 2022 with singers Leah Hawkins, Anna Christy, Sarah Coit, Jonathan Johnson, Jarrett Ott and David Leigh. The singers he’ll perform with during the 2024 festival include Lydia Grindatto, Erika Baikoff, Sarah Mesko, Duke Kim, Justin Austin and William Guanbo Su.

2024 marks Tweten’s third consecutive summer acting as curator and pianist for Performance Santa Fe’s Festival of Song. Singers that he has partnered with in these recitals include Tamara Wilson, Heidi Melton, Elena Villalón, Nicholas Brownlee, Jack Swanson, Emily Fons, Ailyn Perez, Robert Watson, Samantha Hankey, Huw Montague Rendall, Lauren Snouffer and Rolando Villazon. The 2024 Festival included recitals with Jennifer Johnson Cano, Anthony Roth Costanzo, Liv Redpath, Paula Murrihy, William Guanbo Su and David Portillo.

During his tenure at NEC, Robert has conducted 12 productions of repertoire spanning over 350 years, including: Later the Same Evening, Le nozze di Figaro, Postcard from Morocco, Il re pastore, La Calisto, Don Pasquale, Dido & Aeneas, An American Dream, L’Enfant et les Sortilèges, L’arbore di Diana, Die Fledermaus and La bohème. 

Conducting engagements during the 2024/25 season will include a return to Utah Opera to conduct Sweeney Todd, productions of Susannah and Later the Same Evening at NEC, and his debut with Pacific Opera Victoria leading Rigoletto.