The Rock Mill is the culmination of a life long love of music of both our founders. Roscoe Justice and Jennifer Satterwhite have an intense love for music and are so happy to be able to bring this dream to fruition here in the middle of Historic Old Town Keller!


The Rock Mill provides a safe and fun environment for students of all ages to come and work on every facet of music performance. We have a state of the art recording studio with the gear and staff to do any level recording project you can imagine. We have multi-tiered lesson and band dynamics packages for all ages and experience levels. Whether you're a total beginner looking to get started or an experienced player needing to take your performance to the next level, there is a place for you here!

The People Behind The Music

Roscoe Justice

Founder of  The Rock Mill Music Academy

Roscoe has been performing onstage all his life, starting at the age of six. He began vocal lessons shortly after and was cast as the lead in several school musicals throughout grade school and high school, such as the Prince in Cinderella, and The Velveteen Rabbit, among others. By the age of eighteen he had also won two national vocal awards in classical and operatic performance. Roscoe came from a very musical family with several uncles who were accomplished bluegrass, country and gospel musicians. He began to pursue the guitar in his early teens and won several competitions with his first band Vas Deferens during high school, and later formed The Laid Law Union with whom he performed and toured with extensively for the next few years. Roscoe was then signed to a production deal with Mind Ignition LLC out of Cincinnati, Ohio, and formed The Roscoe Justice Band. He has opened up for and performed with several renowned recording artists such as Bonnie Raitt, Jackson Browne, Foreigner, Dr. Hook,and B.B. King. Roscoe has taught and administered in music schools for the past decade, and with his partner Jennifer Satterwhite, opened The Rock Mill Music Academy in June of 2018.


Ezrie Katzen

Music Instructor/ Engineer

Casey Williams

Music Instructor

Casey is originally from south Louisiana but has lived in the Fort Worth area for more than seven years.  She earned her Bachelor of Music Education, vocal concentration, from Texas Wesleyan University in 2017.  While there she also studied piano, flute, conducting, and composition.  She has performed as a soloist and with school, church, and theater groups in both Louisiana and Texas, as well as directing ensembles of all ages.  Here at the Rock Mill you can find Casey teaching private voice, piano, guitar, flute, or ukulele, and small group classes.

Ezrie is an accomplished guitarist, and studio engineer. He has produced and engineered several EPs for regional artists and is currently working on several projects here at Rock Mill Studios for student artists, and local performers. Ezrie teaches guitar, bass, drums, piano, as well as several other instruments. He is currently working on a degree in communications at TCC in hopes of furthering his connections in the music industry.

Alex Massey

Music Instructor

Alex is 26 years old, born in Northern California and raised in Fort Worth, Texas. Alex started playing drums when he was 12 years old and received professional training at 16 years old. He has played in several bands through grade school and college, toured in the lower 48 and has played on several albums. Alex has a passion for teaching music and has been doing so for over 4 years.

Aaron Toney

Music Instructor

Aaron is 20 years old and is currently enrolled at TCC working towards his associates degree in music, and has aspirations to attend Berklee College of Music in Boston. He started playing bass when he was twelve, and has since studied other instruments such as guitar, drums and piano. Aaron performs in a few projects around the DFW area and has played in bands and ensembles since he was 13. He has taught for a little over two years, but discovered his passion for teaching music back in high school as an intern at local music schools.


Grant Fitzpatrick

Music Instructor

Growing up in Australia, Grant started performing writing, recording, producing independent music and by 1990 had embarked on a full time career as a touring music professional.


In 2006 Grant relocated to the USA to sign and record with NYC band MINK and release their Sylvia Massey produced self titled album. Subsequent US Canadian & Australian tours followed with KISS, Angels and Airwaves and Perry Farrell.


In 2015 Grant began touring as the bassist for the Los Angeles based band The Cult and in following tours performed with Soundgarden, Tool, Guns & Roses , The Who, Stone Temple Pilots & Bush. Currently the band is in the middle of a sold out international tour celebrating the 40th Anniversary of Sonic Temple.


Grant has 30 years experience of working professionally in live performance and music production and is excited to share what he's learned along the way.

Jax Justice

Mascot and

The True Power Behind The Scenes

Who is Jaximillion Justice?

Jax is a complex personality, as are most of the small breed of modern day renaissance millionaire dog business owners. Jax enjoys disc retrieval, long walks on the beach, and a good steak bone from most upscale local DFW restaurants. Never one to shy away from hard work, Jax has indelibly become a cultural icon here at The Rock Mill. Look for his solo album to drop in 2020.



WE WON! The Rock Mill is proud to announce that we were named Living Magazine's Best Music School in Keller in 2020! Thank you so much for voting #BESTOF2020! Check us out at LivingMagazine.net and in the August edition of the magazine!


The Rock Mill is proud to announce that we made Hulafrog's Most Loved list! This award is only given to family-friendly companies that receive the most votes from parents and the community.

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Society Life Magazine has named The Rock Mill in their "Tops in Tarrant" 100 Best in Industry. This award is only given to companies that received the most votes from the people in the community.