Alberti Walter, Silvano Carroli, Bruna Baglioni, Bonaldo Giaiotti, Ida Ciucci, Nunzio Todisco, and Maurizio Trombetta who were exceptional instructors and voice coaches.
While in Italy, Yu Seok performed in numerous operas, including La Traviata, La Boheme, Il Trovatore, L’elisir d’amore, Tosca, Madama Butterfly and Pagliacci. In addition, he participated in numerous competitions including Alberto Gori International competition and Massafra International competition and won 1st prize.
In 2009, after coming into the United States, Yu Seok is building his career profile, engaging in many Seattle Opera Guild performances and he worked with numerous opera companies, classic oratorios and solos. Becoming the Regional Winner in 2009 Metropolitan Opera regional competition was a huge milestone achievement for the Baritone. Yu Seok is planning to engage in various performances in the States and abroad in Europe and Korea.