As an ensemble member of Badisches Staatstheater Karlsruhe, Lee performed Zerbinetta in Ariadne auf Naxos, Lauretta in Gianni Schicchi, Norina in Don Pasquale, and Sandrina in La finta giardiniera. During her years at Theater Kiel, Lee gained extensive operatic experience by singing Contessa di Folleville in Il viaggio a Reims, Lucia in Lucia di Lammermoor, Adele in Die Fledermaus, Rosina in Il barbiere di Siviglia, Gilda in Rigoletto, the Queen of the Night in Die Zauberflöte, Susanna in Le nozze di Figaro, and Zerbinetta in Ariadne auf Naxos. Lee has been invited to sing at some of the world’s most prestigious opera houses, such as San Francisco Opera, where she performed Fiakermilli in Arabella, Ah Sing in the world premiere of John Adams’ Girls of the Golden West, Olympia in Laurent Pelly’s famous production of Les Contes d’Hoffmann, and Madame Mao in Nixon in China. Other venues she has been associated with include Dutch National Opera in Amsterdam, Saarländisches Staatstheater in Saarbrücken, New Zealand Opera, Dayton Opera, and Florida Grand Opera. Her engagements in 2022/23 include appearances at the LA Phil, Badisches Staatstheater Karlsruhe, and Theater Dortmund. Lee was a finalist in the BBC Cardiff Singer of the World competition, representing South Korea, and a national semi-finalist in the Metropolitan Opera National Council. She has also won prizes in the Shizuoka International Opera Competition, the Maria Callas International Music Competition, and the ARD International Music Competition.