Although Scott spent the majority of his career at the Met, he did occasionally perform with other opera companies both in the United States and abroad.
His opera career was stalled due to World War II, during which time he served as a lieutenant in the United States Navy in the South Pacific.
[2] Scott's popularity among New York audiences led to his being offered a contract by Rudolf Bing to join the roster of singers at the Metropolitan Opera.
He accepted, making his debut with the company as Monterone in Giuseppe Verdi's Rigoletto on November 15, 1951 with Leonard Warren in the title role, Richard Tucker as the Duke of Mantua, Hilde Güden as Gilda, and Alberto Erede conducting.
Some of his more important roles at the Met included Colline in La Bohème, Daland in The Flying Dutchman, both The King of Egypt and Ramfis in Aida, Méphistophélès in Faust, Pimen in Boris Godunov, Raimondo in Lucia di Lammermoor, and Sarastro in The Magic Flute.