Brennan High School


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Working together for student academic success by providing nutritious meals in a cost effective and pleasant environment.


 District calendars are listed and approved two years in advance. For individual schools, only campuses with Google Calendars are featured here.


NISD's mission is to provide all NISD students who are eligible to ride the bus a safe, efficient, nurturing environment that supports the educational and extra-curricular objectives of the district.


Northside ISD continues to enforce its “No Shots, No School” policy. Texas law requires all public school children have current immunizations in order to attend class.

Campus Information

Year Open:

Bond Year:

School Mascot: Bears

School Colors: Gold, Black

Dr. John Trimble
Dr. John Trimble - Principal
Dr. John Trimble has been an educator for 22+ years. He has worked at Jay High School, Stevens High School and several school districts in West Texas. Prior to being named Principal at Brennan High School, he was previously a special education teacher, special education department coordinator, assistant principal, and vice principal.

During his tenure at Northside ISD, Dr. Trimble was part of the inaugural 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.
Associate Principal Joshua Hall
Joshua Hall - Associate Principal

The Associate Principal also serves as the Campus Behavior Coordinator. They can be reached by email at or by phone at 210-398-1265.

Mr. Hall arrived at Northside ISD back in 2008. He enjoyed 9 years at Warren High School as a science teacher and soccer coach before moving to Stevens High School and spending 8 months as an administrator intern. Mr. Hall then worked at Marshall High School for 3 years as an Assistant Principal before moving again; this time to Brennan High School in his current role as Associate Principal. Prior to entering the education field, Mr. Hall served in the United States Air Force where he was an instructor at the Military Working Dog (K-9) school at Lackland AFB. Mr. Hall earned his Bachelor’s degree from American Military University, and his Master’s degrees from AMU and UTSA.

Dr. Michelle Craig
Dr. Michelle Craig
Academic Dean
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