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In college, Seymour participated in some of America's finest music festivals, including Music Academy of the West, Chautauqua Institution and the New York String Orchestra Seminar at Mannes College.
In the midst of his performance schedule, he taught at various facilities, first at the Institute of Musical Art (1922–1938), then at the Mannes College (1943), the Peabody Conservatory (1947–1965), Tanglewood (as of 1949), the Cleveland Institute of Music (1964–1967), and also at Queens College beginning in 1969.
Studies at Mannes College of Music in New York (with George Coleman, Ellery Eskelin, Richie Beirach m fl), The Malmö Academy of Music etc.
As a student, he attended opera workshops at the Goldovsky Opera Workshops, Denver Colorado and Wheeling West Virginia; Mannes College of Music New York, Hunter College New York and was chosen by Maria Callas as a member of the Juilliard Opera Theater.