American organist, organ builder, and composer Olivia Margaret Ontko (b. 1947) is a graduate of Westminster Choir College and studied organ with Charles Dodsley Walker, Mary Krimmel, George Markey, and William Whitehead. She studied composition with Warren Martin and David Stanley York. As an accomplished organ builder, in addition to new instruments, she has maintained several notable organs, including the Wurlitzer theatre pipe organ at Radio City Music Hall, New York City. Ontko’s output as a composer includes works in many genres, including two organ symphonies, choral and vocal works using sacred and secular texts, and a concerto for organ and orchestra that was premiered during the Spoleto Festival USA by the Charleston Symphony Orchestra.