Aaron Kline is a composer, theorist and conductor. His music has been performed across the U.S. including at the the Society of Composers Region IV Conference and the University of Missouri – Kansas City Composition Workshop. He has taught composition lessons to students at the secondary, undergraduate and graduate levels, using principles he gleaned from his composition pedagogy research. His music theory research focuses on the relationship between form and orchestration in 20th- and 21st-century compositions for wind ensemble.

Kline teaches music theory, musicianship, orchestration and composition at Cal Poly. He previously taught theory and ear training at Texas Christian University, and composition, theory and marching band at Tarrant County College. He was also the head band director at Alvord ISD in Texas, where he taught 4th and 5th grade music, beginning woodwinds, beginning percussion, middle school band, and high school concert, marching and jazz bands. Under his direction, the middle and high school bands achieved their first sweepstakes awards in school history.

Kline holds a D.M.A. in composition with cognates in music theory and music history from Texas Christian University, an Master of Music degree in composition from Central Michigan University, and a Bachelor of Music degree in composition from Texas Christian University. His primary composition teachers include Blaise Ferrandino, David Gillingham, Neil Anderson-Himmelspach, José-Luis Maúrtua and Till Meyn.