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
Vice Principal Robert Martinez
Robert Martinez - Vice Principal

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

Mr. Martinez arrived at Northside ISD back in 2006. He enjoyed 6-years at John Jay High School as a History and Video Tech Teacher before moving to Clark High School as an Assistant Principal. Mr. Martinez was a Clark Cougar for 4.5-years before moving again; this time to Brennan High School in his current role as Vice Principal. Prior to entering the education field, Mr. Martinez was a News Producer at KENS 5 TV. Mr. Martinez earned his Bachelor’s degree from UTSA, and his Master’s degree from Concordia University. He is also an NISD product, as a proud graduate of John Jay High School.
Academic dean Michelle Craig
Michelle Craig - Academic Dean
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