Trinette began her professional career with New York’s Joffrey Ballet in 1965. Following her graduation from high school, she attended The Joffrey Ballet School in New York City on a full scholarship and joined the company a year later. In 1968, Singleton appeared on the cover of Time and had the distinction of being the first dancer to appear on the cover of a national news magazine.
While with the company, Singleton toured throughout the U.S., Canada, Mexico and Europe, performing in ballets by notable choreographers such as Joffrey, Arpino, Ashton, Balanchine, Cranko, DeMille, Jooss, Tharp and Tudor. She also performed at the White House for two U.S. Presidents and King Olaf of Norway, and appeared on Broadway with the Joffrey, as part of Nureyev and Friends, tribute to Diaghelev. In 1967, she appeared in the multi-media ballet, Astarte, created for her by her mentor, Robert Joffrey.
Singleton holds her Licentiate from the Imperial Society of Teachers of Dance in London, England. Following her performing years, she was administrative assistant to Robert Joffrey and Ballet Mistress for the company. She also served in residencies at Florida State University, Bucknell University and Washington University, and was a faculty member at The New School University until 2003, and The Joffrey Ballet School through 2004. She directed her own school, Bravo!Dance, in Wilkes-Barre, Pa., from 1995 until 2005. In 1994, she won the National Choreography Plan Award. In 2002, she re-staged Astarte for The Joffrey Ballet Company in Chicago.
Currently, Singleton is co-artistic director of Repertory Dance Theatre in Allentown, and also serves as a faculty member in the DeSales University. Department of Performing and Fine Arts. She has been artistic director of The Joffrey Texas Workshop in San Antonio since 2006, and serves as guest teacher for The Joffrey Ballet in Chicago.