Sandra Jennings was born in Boston and began her dance training with June Paxman of the Washington Ballet and later with E. Virginia Williams at Boston Ballet. Other teachers include Harriet Hoctor, Shanna Bereska, Margaret Gill, and her mother, Jacqueline Cronsberg. At the age of 13, she received Ford Foundation scholarship to SAB in New York. At the age of 15, Jennings performed Balanchine’s Tarantella at New York’s City Center. In 1974, Jennings was asked by George Balanchine to join the New York City Ballet, where she worked with him for the next nine years. During her tenure, she danced a vast repertoire that included principal and soloist roles in many ballets by Balanchine and Jerome Robbins. In addition to becoming a renowned repetiteur for the Balanchine Trust, staging over 30 ballets for companies all around the world, Jennings has taught at schools and companies in the United States and abroad, and has taught at San Francisco Ballet School’s Summer Session since 2000. She was company teacher and ballet mistress at Pennsylvania Ballet for nine years and was company teacher and ballet mistress for the San Francisco Ballet from 2002 until 2006. She currently tours the world as a guest teacher and repetiteur of Balanchine’s works.