Missy Mazzoli worked on a large-scale work for her band Victoire, in collaboration with percussionist Glenn Kotche (of the band Wilco) and poet Matthew Zapruder. She was a Composer-in-Residence with Opera Philadelphia, where she processed the workshopping of her second opera with the company. Her second opera, Breaking the Waves, a collaboration with librettist Royce Vavrek commissioned by Opera Philadelphia and Beth Morrison Projects, premiered to great acclaim in Philadelphia in September 2016 and as part of New York’s Prototype Festival in January 2017. Mazzoli's other projects include her third opera, Proving Up, commissioned by Washington National Opera, Opera Omaha and New York’s Miller Theatre. Proving Up premiered in January 2018 at Washington, D.C.’s Kennedy Center, in April 2018 at Opera Omaha, and in September 2018 at Miller Theatre. A collaboration with librettist Royce Vavrek and based on a short story by Karen Russell, Proving Up offers a surreal and disquieting commentary on the American dream through the story of a Nebraskan family homesteading in the late 19th century.