Complex sentence: Upon leaving Eastman, Gil Evans hired her as his copyist; and she collaborated with him for the next several years, producing arrangements commissioned by Sting and scoring the films "The Color of Money" and "Absolute Beginners".
Split into simpler sentences: Upon leaving Eastman, Gil Evans hired her as his copyist. Schneider collaborated with Evans for the next several years, producing arrangements commissioned by Sting and scoring the films "The Color of Money" and "Absolute Beginners".