Of Dutch ancestry and son of the owner of a large appliance store, Schippers was born in Kalamazoo, Michigan. He began playing piano at age four. After graduating from high school at age 13, he attended the Curtis Institute and the Juilliard School.
Schippers made his debut at the New York City Opera at age twenty-one, and the Metropolitan Opera at twenty-three. He conducted world premieres of now well known music by Gian Carlo Menotti and Samuel Barber. He conducted child actor Chet Allen in a theatrical version of Menotti's Amahl and the Night Visitors. Schippers conducted in all the major opera houses of the United States and Europe, most notably the Metropolitan Opera and La Scala, and founded Italy's Spoleto festival with Menotti and once described his perfect orchestra as being composed of "One-third Italian musicians for their line, one-third Jewish for their sound, a sprinkling of Germans for solidity."
Schippers was a regular conductor with the New York Philharmonic and the Chicago Symphony Orchestra, and made recordings with them as well, but in 1970 he finally took a full-time orchestral position with the Cincinnati Symphony Orchestra, succeeding his predecessor at the Metropolitan Opera, Max Rudolf. After making several recordings with them and building the orchestra's international reputation, his career was cut short by his death from lung cancer at forty-seven in 1977 in New York City, New York.
During the 1970s, he was appointed principal conductor of l'Orchestra dell'Accademia Nazionale di Santa Cecilia but he made only one concert with the orchestra (in May 1976, Ravel, Ma Mère l'Oyé i. a.). He made many opera recordings in his time, and live recordings of his performances are gradually being made available on CD. His studio recording of Lucia di Lammermoor by Gaetano Donizetti with Beverly Sills and Carlo Bergonzi was the first recording in which the glass harmonica was used in the mad scene.
Although gay, Schippers married, in 1965, Elaine Lane "Nonie" Phipps (1939–1973). An heiress to the Grace shipping fortune and a daughter of the noted American polo player Michael Grace Phipps, she died of cancer in 1973. Schippers died of the same disease four years later.
According to the professor, writer, and opera scholar John Louis DiGaetani, Schippers had a lengthy romantic relationship with the composer Gian Carlo Menotti, in addition to a shorter romantic relationship with mathematician Sean Clarke. A biography of Leonard Bernstein states that Schippers and Bernstein also were intimately involved.
- "Oh! to Be 30 at Last". Time. 15 February 1960. Retrieved 2008-01-12.
- Delta Omicron
- Thomas Mallon (11 November 2007). "The Homintern". The New York Times. p. 49. Retrieved 2008-01-12.
- Clum, John M. (May 1996). "Queer Music". Performing Arts Journal 8 (2): 118–126.
- "Born". Time. 23 April 1965. Retrieved 2008-01-12.
- "Mrs. Nonie Phipps Schippers, Conductor's Wife, Grace Heiress Wed in '65 to Cincinnati Leader Dies". The New York Times. 8 January 1973. Retrieved 2008-01-12.
- John Louis DiGaetani. "Menotti, Gian Carlo (1911-2007)". glbtq.com. Retrieved 2008-01-12.
- Burton, Humphrey (1995). Leonard Bernstein. New York: Anchor. ISBN 0-385-42352-7.
- Official website
- Thomas Schippers at AllMusic
- Thomas Schippers at the Internet Movie Database
- Discography of Schippers' opera recordings