Castle Rock Music

My name is Shanya Martinez, and my music journey began 16 years ago right here in this very music store. Today, I’m proud to serve as a middle school choir director and guitar teacher, helping young musicians discover their own love for music.

I enjoy playing a wide variety of guitar styles and have a special passion for musical theater and pop vocals. Over the years, I’ve committed myself to becoming a well-rounded musician—diving into everything from music theory to improvisation—and I truly love every part of the creative process.

I bring high energy, positivity, and a little silliness into every lesson. Teaching isn’t just what I do—it’s what I love. There’s nothing better than helping students grow in confidence, skill, and joy through music.

Landon has been in love with singing ever since he joined his first chorus in 2011. He studied voice with fantastic teachers such as Rochelle Gallup-Walter and Janinah Burnett. With over a decade of choral experience, Landon has honed his vocal talents in esteemed ensembles like UNCG's University Chorale and Chamber Singers and the Colorado All-State Choir .

Landon graduated in 2025 from the University of North Carolina at Greensboro , with a degree in Vocal Music Performance and a concentration in Popular Music and Technology. He also served as a music director for the university's premier coed a cappella group, The Chariots. The UNCG Chariots have competed in the last 2 ICCA South quarterfinals .

Landon was also in the hip-hop band The Funkscribes, who performed several times at the Carolina Crown Theatre. Landon brought energy, versatility, and a great presence to the stage. His musical journey has even taken him abroad to the University of Plymouth in the U.K ., where he delved deeper into Live Sound Engineering and Music Psychology. He was also a member of the Plymouth Student Choir in his semester abroad.

Landon creates a fun, comfortable, and safe environment for students to gain more confidence not only in their voice, but also themselves. Landon ensures students will learn proper vocal technique and music theory while keeping the student's passion for music at the forefront of every lesson. Along with voice lessons, Landon loves working with beginning piano students; assisting them in building the techniques that keeps students wanting to make beautiful music!

Regan is a Soprano from the Bay Area. She recently graduated from the University of Denver with a Bachelor of Music in Voice Performance. She began performing first as a dancer, but quickly grew to love singing even more! She has taught voice and beginner piano for the past 5 years and started performing long before that. She also has an extensive choral singing background.

As a performer and teacher, she believes in proper and healthy technique that can be used for any genre. She has studied voice pedagogy for the last few years and strongly believes that a healthy voice is a happy voice. She has experience in both musical theatre and classical music.

Regan is so excited to teach at Castle Rock Music and can’t wait to meet new students. She teaches all age groups and styles of voice as well as beginner piano.

Victoria has been singing in choirs, musicals, and solo performances for most of her life.

She has 2 years of professional experience traveling with a variety of choir ensembles across the United States, including the Hawaiian islands. She has performed solo at Red Rocks Amphitheater and accompanied the Colorado Ballet, for a performance of The Nutcracker, with her high school choir Versailles.

She attended Lee University for their degree in music business and is continuing her education at CU Denver.

Victoria believes in helping her students find a love for music. 

"It should be something they enjoy and find passion in."

Victoria especially enjoys working with piano students who are just starting. She is passionate about helping them grow and learn the necessary techniques and theory, while also having fun making music!

Emma was given the opportunity to play the violin at ten years old. She soon added the viola, cello, piano, and voice, and began composing classical music at eleven years old. She has been studying music theory and composition with Dr. Treibitz at the collegiate level since age twelve. Emma has been teaching music for almost a decade and loves to teach all subjects in a fun, uncomplicated format.

Students can expect critiques and positive affirmation with each aspect of their playing and singing. Propper technique is a musician's bread and butter. Encouraging students to look into the background and history of each piece they are playing is essential to understanding what type of technique to use and how to use it properly. Additionally, Emma believes a solid understanding of music theory is essential to strengthening one's musicianship.

Emma studied violin and viola with Basil Vendrys, Lydia Sviatslovskaya, and Dr Emily Ondracek-Peterson, voice with Laura Nolen, Rochelle Gallup-Walter, and Ginger Allen, cello with Olga Orgranovitch, and music theory and composition with Dr Howard Treibitz and Thomas Blomster. 

Celine has been singing and performing for the majority of her life, and has been in love with it since the beginning! She is currently earning her bachelor of music with a concentration in voice performance at Metropolitan State University of Denver.

She has gained experience by being involved in several choirs throughout middle school, high school, and college. A couple of these include the choir Versailles, where she accompanied the Colorado Ballet's performance of The Nutcracker, and the well known Metropolitan State University of Denver Chorale.

Having spent years studying proper singing technique, she has become very well rounded in many different genres of music. Celine has also been involved in many theatre productions such as Chicago, Mamma Mia!, Les Misérables, and many more.

In addition to teaching voice, Celine also teaches beginner piano! She works especially well with younger kids when it comes to learning the basics, while still keeping lessons lighthearted and fun.

Celine first discovered her love of teaching when she volunteered as the music director for Castle Rock Middle School's Rogue of the Railway musical. Since then she has been inspired to share her love for music with her students, while encouraging them to grow as knowledgeable musicians.

Marguerite Juenemann has an on-going performance career of over 30 years, nominated twice for a Grammy, toured in Benny Goodman's band in the 80's playing prestigious stages nationally and internationally. Her solo career experience covers R&B, Folk, Gospel, Bluegrass, Blues, and Jazz on stage and in the studio. She teaches singing, acoustic guitar and classical piano. She also encourages young composers to bring their original compositions to use as lesson material, teaching them how to protect their originals by transcribing them to staff paper for copyright and other purposes.

Academically, she was a piano/woodwinds major at CU Boulder, having studied both instruments since childhood. Teaching experience covers 18 years at State Universities on the East coast and in Denver, Conservatories in Europe, the UK as well as New England Conservatory in Boston, teaching not only Jazz and Improvisation but popular styles of music mentioned above.

Marguerite loves teaching budding musicians from age 7 to 77. As some have attested, she can be the same age as her student which makes them comfortable taking instruction from her. She is passionate about bringing out a students' talent with classic instruction, making it possible for the student to play any music they choose rather than only teaching how to play "that song".