Meet the Bears

About

Campus Information

Year Open:

Bond Year:

School Mascot: Bears

School colors: Gold, Black

Namesake

District handbook
School handbook
Dr. John Trimble
Dr. John Trimble - Principal
Dr. John Trimble has been an educator for 26 years. Prior to being named Principal at Brennan High School, he worked at Jay High School, Stevens High School and several school districts in West Texas where he served as a special education teacher, special education department coordinator and assistant principal.

During his tenure at Northside ISD, Dr. Trimble was part of the inaugural administrative staff at Stevens High School and Brennan High School where he served as the assistant principal and vice principal, respectively.

Dr. Trimble attended Angelo State University where he earned his Bachelor of Science in Psychology/Criminal Justice and his Master of Education in School Administration. He earned his Ph.D. in Leadership Studies from Our Lady of the Lake University.

He believes quality education is a key component to success and looks forward to creating these opportunities at Brennan High School.
Ryan Brassell - Associate Principal

The Associate Principal also serves as the Campus Behavior Coordinator.

Also serves as the Campus Title IX Coordinator.

Mr. Ryan Brassell has been in education for over 25 years. He began his tenure in Mesquite ISD in the year 2000. While there he served in a number of roles prior to becoming an assistant principal at one of the local high schools within Mesquite ISD. Mr. Brassell came to Northside ISD in the 2022-2023 school year. He began as an assistant principal at Brennan High School before becoming the associate principal at Brennan.

Mr. Brassell grew up in the Pineywoods of northeast Texas near the Louisiana border. He attended Stephen F. Austin State University in Nacogdoches where he obtained his Bachelor's degree in Kinesiology with an endorsement in Special Education. While with Mesquite ISD, Mr. Brassell earned his Master's degree from the University of Texas A&M - Commerce (now East Texas A&M University).

Mr. Brassell is happily married to his wife Jodie and has 2 boys, Brayden and Asher and a daughter Madeline who resides in the Dallas area. Mr. Brassell is a lover of the outdoors from hunting, fly-fishing, camping, etc.

  • Dr. Michelle Craig
    Dr. Michelle Craig
    Academic Dean
  • Billy Logwood
    billy.logwood@nisd.net
    Billy Logwood
    Assistant Principal

    Mr. Logwood is excited to be Assistant Principal at Brennan High School. Mr. Logwood is a military veteran with the Air Force. He was previously the Programs Coordinator at NSITE High School. He has been a CTE Department Coordinator and teacher at NSITE/Holmes High School, Harlan High School and Harlandale High School, in Harlandale ISD. He taught Business, Technology and Social Studies courses at those campuses.  He loves sports and extracurricular activities.  He was previously a basketball, football, and tennis coach and a sponsor of various clubs.  He is a volunteer and a mentor for Communities in Schools working with at-risk students.  He brings a strong work ethic to this position.

  • Denise Pina
    denise.pina@nisd.net
    Denise Pina
    Assistant Principal

    I'm thrilled to return to the Brennan family as an Assistant Principal. Throughout my career in education, I have served as a high school English teacher, middle school Gifted & Talented Specialist, Campus Testing and 504 Coordinator, and Campus Programs Coordinator at a magnet high school. These diverse experiences have strengthened my commitment to supporting students, empowering teachers, and building strong school communities.

    As a first-generation college graduate, I believe deeply in the power of education and lifelong learning. I've earned certifications in English, Speech, Reading, Dance, Principalship, and Superintendency, demonstrating my dedication to personal and professional growth. I also serve as a presenter for Organizational Staff Development in NISD, where I enjoy welcoming and mentoring new teachers, parents, and students as they begin their journey in the district.

    Outside of school, I consider my greatest accomplishment to be being a mom to my amazing son. Together, we participate in monthly 5K races and are co-authoring a children's book series that celebrates and supports children navigating two-household families. Our first book is titled I Have Two Houses.

    I'm passionate about creating a positive, inclusive learning environment where every student and staff member feels valued, supported, and inspired to succeed. I'm excited to partner with the Brennan community and look forward to making a meaningful impact.

  • Sharon Rodriguez
    Assistant Principal

    Welcome from Bear Country!!! 

    I am honored to continue my journey as a campus leader at William J. Brennan High School as your new assistant principal. After serving as the Student Success Advisor for Advanced Academics since the Fall of 2022, I began transitioning into this new leadership role in March 2026.

    My roots in education and this community run deep. I am a proud graduate and former Class President of John Jay High School, where I also later returned to serve in the Department of Social Studies from 2013 to 2022. Over my career in education, I have spent many years as a classroom teacher across Texas, including stints at Richardson ISD's Lake Highlands High School (recognized as a Top 100 High School in the Nation 1999) and Medina Valley ISD. During my time at Medina Valley High School, I was honored as the 2001 KENS-5 Excel Teacher of the Year and coached back-to-back UIL Academic State Championship Current Issues & Events Teams in 2004 and 2005.

    I hold a Bachelor and Master of Arts in Political Science from St. Mary's University right here in San Antonio, as well as a Master of Education (M.Ed.) in Curriculum & Instruction with an emphasis in Instructional Technology from Houston Baptist University.

    When I am away from Brennan, I love traveling, listening to music, and cheering on my favorite sports teams. I'm a massive sports fan—especially when it comes to baseball—so you can always catch me rooting for the Houston Astros, Texas Longhorns, Dallas Cowboys, and of course, our San Antonio Spurs!  

    I am thrilled to bring my passion for student success, instructional technology, and academic excellence into this new role. Let's make it a great year!

    #NorthsideProud #BFND

  • Kurt Wunderli
    Assistant Principal

    Welcome to Our School Community!

    We are excited to welcome Assistant Principal Kurt Wunderli to our campus leadership team for the upcoming school year. We look forward to the experience, dedication, and commitment they will bring in supporting our students, staff, and families.

    A photo and biography will be added to this page in the fall. We are excited for them to join the Northside ISD family and become an active part of our school community.

    Thank you for your continued support as we work together to provide an outstanding educational experience for all students.