Meet our team.

Artistic Staff

 passport crop.jpg

Carole Nelson

Artistic Director

Ms. Nelson was on the faculty of the Music Department at the High School for the Performing and Visual Arts for 25 years as a choir director and the voice teacher. She left HSPVA to serve as the Artistic Director for Houston Boychoir. She has prepared choirs for work with the Houston Symphony Orchestra, Houston Grand Opera, the orchestra and opera program of the Moores School of Music, Opera in the Heights and the Houston Bach Society. Prepared works include: Karl Orff’s Carmina Burana, Boito’s Mephistopholes, Bizet’s Carmen, Puccini’s La Boheme and both of Mahler’s Choral Symphonies No. 2 and No. 8.

She has led Houston Boychoir in concert tours of Washington DC, Chicago, New York, St. Louis and various cities throughout the United States. Foreign tours have included a fourteen-day tour of the Republic of China and most recently a concert tour of East Germany including Leipzig, Berlin and Dresden and led the choir in its debut in Carnegie Hall in 2008. Mostly recently the choir toured South Africa serving as youth ambassadors of Houston’s Cultural Arts.

Ms. Nelson is on the Board of the Southwest ACDA and she has presented choirs at national and state conferences. She is in demand as a clinician and director of Honor Choirs both locally and throughout the United States.


John Markert

Associate Director

In addition to performing as a freelance pianist throughout Houston, John Markert also serves as director with the Houston Boychoir and as director of choral activities at Northbrook High School. He has performed internationally with instrumentalists and choral groups including international choral festivals in Manila and Bangkok, sponsored by the Association of South East Asian Schools, and in performance with flutist Catherine LeGrand in a cultural exchange concert at the Göethe Institute, Bangkok, under the auspices of the US Embassy.


After receiving a Master’s degree in organ performance from Indiana University, John began teaching choir in Houston, Texas. Shortly thereafter, John also became the music director at Zion Lutheran Church in the Heights and spent a great deal of energy developing the music program there. He started several new outreach programs including a Scholarship Singer program in which high school juniors and seniors served as weekly paid singers. Additionally, John began an annual children’s hymn fest where area elementary students work with renowned choir directors and organists from throughout the country in a weekend workshop and children’s hymnfest.


In the summers John likes to spend his time attending seminars and workshops, and traveling to Thailand.


Holly Holt-Cabrera

Director, Preparatory Choir

Mrs. Holt Cabrera has been a music teacher and elementary choral director in Houston since 1996, serving at The Rice School for nineteen years, and most recently at Presbyterian School.  Over her career, she has been named Teacher of the Year twice, has been a guest clinician for area Elementary Honor Choirs, and has been a presenter at the Texas Music Educators Association (TMEA) convention and the ACDA Children’s Choir bi-annual retreat.  Her choirs have had the privilege of performing at TMEA as an invited group on three occasions, as well as in and around the city of Houston at such venues as the Hear the Future concert with the Houston Chamber Chorus, the 10th anniversary celebration for the Center for the Healing of Racism, and Mahler’s 3rd Symphony with the Texas Medical Center Orchestra. 

Mrs. Holt Cabrera holds a Bachelor’s degree in Music Education from Southwest Baptist

University, where she graduated Cum Laude, was voted Most Outstanding Music Graduate, and was inducted into Pi Kappa Lambda. She has also earned a Masters Degree in Vocal Performance from Baylor University and is Kodaly Certified.


Vasti Cantú Adkins

Associate Director, Preparatory Choir West and East Campus & Office      Assistant

Vasti Cantú Adkins received her Bachelor‘s degree in Music Education from Houston Baptist University and is a graduate of Houston’s High School for the Performing and Visual Arts. Mrs. Adkins has taught at both the elementary school and the middle school levels having served as the elementary music specialist at Harvard Elementary School and as a choir director at the Meyerland School for the Performing and Visual Arts. She teaches piano, general music and voice at St. Andrew‘s School of Fine Arts (SOFA) and has held staff musician positions at various churches in the Houston area including Iglesia Fe y Poder, St. Andrew’s Presbyterian Church and Christian Tabernacle. Vasti is in high demand as a singer and a teacher and she just released her first EP, Emanuel found on Apple Music.


John Gallagher

Director, Olde Boys

John Gallagher has been a singer and choral music educator for over ten years. Mr. Gallagher is a graduate of the University of Houston, and studied choral conducting under Betsy Weber. He taught choir in Alvin ISD for a total of seven years, and is starting his fifth year as a private voice teacher and professional singer. As a choral conductor, Mr. Gallagher’s students achieved success in UIL and TMEA contests, and even had the opportunity to sing for president George H. W. Bush at his 2015 “Points of Light” Conference. As a professional singer, Mr. Gallagher has performed with the Houston Chamber Choir, CANTARE Houston, the Houston Ballet, and as a soloist with the Houston Symphony. John Gallagher currently serves as a staff singer at Christ Church Cathedral in downtown Houston. He lives in Pearland with his partner, Jennifer, their daughter, Lily, and their two dachshunds.


Haley Sabaka

Executive Associate

An advocate for high-quality music education programs, Mrs. Sabaka serves on the Houston Boychoir staff to facilitate program development and communication. Mrs. Sabaka began working with the Houston Boychoir as an accompanist in 2017 after completing her Master of Music degree in Musicology at Northwestern University. She earned her undergraduate degree in Piano Performance at Baylor University, where she graduated Summa Cum Laude with distinction for research in music theory and musicology. Outside of Houston Boychoir, Haley is a church musician at Sojourn Heights and she volunteers for visual arts programs in the greater Houston area. She lives in the Heights with her husband and vizsla.

Administrative Staff

Pam Henjum

Executive Director

Erta Gervais

Administrator West Campus

Jayne Fowler

Administrator Central and East Campuses

Ariel Workeneh

Accompanist East Campus

Malachi Boyle

Alumni Associate Central Campus

Brent Campbell

Alumni Associate Central Campus

Noah Court

Alumni Associate West Campus

Ethan Gonzalez

Alumni Associate Central Campus

Caleb J. Martinez

Alumni Associate West Campus

Miles Oppinger

Alumni Associate West Campus

Brendon Jiang

Alumni Associate Central Campus

Douglas Parada

Alumni Associate Central Campus

Jacob Parada

Alumni Associate Central Campus

Board of Directors

Mindy Harper, President
*Brittain Cunningham, treasurer

Jayne Fowler, secretary
* Matthew Fowler

Nancy Haywood
Pamala Henjum
Louise Magruder

Gene McKelvey 
Carole Nelson

Fred Nevill
* Paul Roch

*Jeremy Simmons

Advisory Board

* Scott Allen
* Neeki Bey
Rick Erickson

Dr. Wendell Mendell
Dr. Robert Nelson
Dr. Michael Remson
Sally Schott

*Houston Boychoir Alumnus