Daniele Rustioni will become just the third principal guest conductor of the Metropolitan Opera in its nearly century-and-a-half history, leading at least two productions each season starting in 2025-26 as a No. 2 to music director Yannick Nézet-Séguin.

Rustioni agreed to a three-year term, the company announced Wednesday. He is to helm revivals of “Don Giovanni” and “Andrea Chénier” next season, Puccini’s “La Bohème” and “Tosca” in 2026-27 and a new production of Verdi’s “Simon Boccanegra,” possibly in 2027-28.