Matthew Valentine is a multifaceted composer and educator who founded MV Expressions, LLC, and serves as an Arranger and Project Manager for MJM Works. As the Director of Bands at San Marcos High School (2018–2021), Matthew’s leadership secured UIL Sweepstakes honors and advancement to the Area D Marching Contest. His previous role at William B. Travis ECHS also resulted in UIL Sweepstakes achievements for the program.

Matthew’s musical foundation was built at Texas State University and during his service in "The Commandant’s Own" USMC Drum and Bugle Corps (2010–2014). He has studied advanced conducting in Italy and competed as a semi-finalist in the National Trumpet Competition. Beyond the classroom, Matthew has served on the brass and visual staffs for The Crossmen and the Texas State Bobcat Marching Band, while maintaining an active portfolio of original compositions and arrangements.