[2] His father, Ernest Peter Tiboris, was a dentist from Sheboygan, and his mother, Stella Menas, was a first-generation Orthodox Greek-American from Waukegan, Illinois.

[2] 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.

[7] Since 1988, English composer and conductor John Rutter has made over 100 appearances with MidAmerica, including at the world premiere of his Mass of the Children in February 2003.

[7] The company has become a launching pad for Elysium Recordings, Inc.,[15] a CD label founded in 1995 which includes significant works by Mascagni[16] and performances by Lukas Foss.

Tiboris wrote an autobiography together with Alex Kitroeff, released in 2024 to mark the 40th anniversary of MidAmerica Productions, A Musical Odyssey.