While serving as associate professor in Louisiana in 1983, Tiboris was asked to organize a concert in New York City to commemorate the 25th anniversary of
Archbishop Iakovos as
Primate of the Greek Orthodox Church of North and South America. The concert, on January 7, 1984, at
Alice Tully Hall, Lincoln Center, brought together soloists, choruses from Louisiana and New York, and the
American Symphony Orchestra for a Greek-themed program which included the world premiere of
Dinos Constantinides'
Hymn to the Human Spirit and the New York premiere of his
Lament of Antigone. Tiboris conducted many works in the choral repertoire as well as symphonic works, operas, and ballets, and
Mikis Theodorakis, as well as rarely performed works by Cherubini and Rossini. He also conducted in more than 20 countries. including over 1,000 concerts in New York, in such venues as Stern Auditorium, Weill Recital Hall at Carnegie Hall, Avery Fisher Hall and Alice Tully Hall,
Lincoln Center. The original choral format has expanded to include Madrigal Festivals, a National Wind Ensemble, Vocal Jazz Festivals, National Festival Youth Orchestra,
Sweet Adelines, and solo concerts featuring
Stanley Drucker. The company has become a launching pad for Elysium Recordings, Inc., a CD label founded in 1995 which includes significant works by Mascagni and performances by
Lukas Foss. They founded an annual music festival in Greece, the Festival of the Aegean, on the Island of
Syros, with performances of music including opera, orchestra, jazz and folk. Tiboris founded MidAm International, Inc., a producer of concerts in Europe and Asia. ==Personal life and death==