Toby Castillo Walters is a Northside Independent School District academic dean, and an adjunct English instructor in the Alamo Colleges District. Walters lives just outside of San Antonio city limits, and previously ran for the MVISD board. He also holds a doctorate in education, and a master’s degree in bilingual education.

4 Medina Valley ISD residents seek 2 school board posts

Toby Castillo Walters holds a master's degree in bilingual education and a doctorate in education. He lives just outside San Antonio city limits.

Toby Castillo Walters, an academic dean at Northside ISD’s Jordan Middle School on San Antonio’s Far West Side, is also running for the board. He previously ran for a single member trustee seat on the board in 2025 and is a graduate of Medina Valley High School. He did not return requests for comment.

San Antonio-area school board races: What to know before May 2

Toby works as an academic dean at Northside Independent School District’s Jordan Middle School and as an adjunct English instructor in the Alamo Colleges District.

Election results: Incumbent trustees mostly successful in school races

Medina Valley ISD had three trustee seats up for election, and two of the three races were competitive.

In Single Member District 1, Benito Juarez and Al Anaya ran to fill a two-year unexpired term. Ben Juarez was appointed to the position last May to fill a vacancy. Juarez won the race by less than 10 votes.

In Single Member District 3, incumbent Matt Castiglione was challenged by Toby Castillo Walters. Castiglione won re-election by less than 15 votes.

In Single Member District 4, Suzanne Lee ran unopposed and was duly elected.

School board challengers break through in Northside, SAISD, Boerne, and Judson

Toby previously challenged an incumbent for a Medina Valley Independent School District Single Member District 3 trustee seat but did not win.

School board challengers break through in Northside, SAISD ...

2026 Texas General Election

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As of September 24, 2026, Toby Castillo Walters did not have a website or any information online.

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Toby Castillo Walters, an academic dean at Northside ISD’s Jordan Middle School on San Antonio’s Far West Side, is also running for the board. He previously ran for a single member trustee seat on the board in 2025 and is a graduate of Medina Valley High School. He did not return requests for comment.

On his campaign website, Walters wrote he is running for school board to “stop the academic decline in our district by demanding equitable, transparent, and defensible spending while accelerating academic growth.”

Calls for equitable, transparent, and defensible district spending to address academic decline and accelerate academic growth.

- Calls for equitable, transparent, and defensible district spending to address academic decline and accelerate academic growth.

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Toby Castillo Walters

As of September 24, 2026, Toby Castillo Walters’s website did not contain information on this issue.

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Toby is an academic dean with the Northside Independent School District and an adjunct English instructor in the Alamo Colleges District.

Medina Valley ISD had three trustee seats up for election, and two of the three races were competitive... In Single Member District 3, incumbent Matt Castiglione was challenged by Toby Castillo Walters. Castiglione won re-election by less than 15 votes.

Fillinger works in information technology at USAA and Nash owns a construction business. Fillinger is the current board president. Andrew Carawan, a former MVISD teacher and Toby Castillo Walters, an academic dean at Northside ISD, challenged Fillinger and Nash but lost. Medina Valley has a large footprint covering nearly 300 square miles and enrolls about 10,500 students, but only a small fraction of eligible voters cast their ballots. As at-large seats, all Medina Valley voters were eligible to vote for both trustee seats. Less than 500 people did.

Live results: San Antonio-area school board elections

Toby previously ran for a Medina Valley Independent School District trustee seat in Single Member District 3 but did not win. He later challenged Nathan Fillinger and Blane Nash in a trustee election but lost.

He continues to teach English at the college level, maintaining direct involvement in classroom instruction. Dr. Walters earned bachelor’s and master’s degrees in Bilingual Education from Texas A&M University–San Antonio and holds a doctorate in Educational Leadership from Texas A&M University–Kingsville.

About | Northside Independent School District

Toby Castillo Walters earned bachelor's and master's degrees in bilingual education from Texas A&M University–San Antonio and a doctorate in educational leadership from Texas A&M University–Kingsville.

Dr. Toby Castillo Walters joined Northside ISD in the Spring of 2025 as Academic Dean, where he leads the campus instructional program with responsibility for curriculum alignment, instructional quality, data use, and continuous improvement of teaching and learning. Prior to joining Northside ISD, he served as a Substitute Teacher, Clinical Teacher, Secondary English Teacher and Soccer Coach, and Instructional Coach in San Antonio ISD, South San Antonio ISD, and Southwest ISD.

Toby Castillo Walters works as an academic dean at Northside Independent School District and teaches English at the college level. He previously served as a substitute teacher, clinical teacher, secondary English teacher and soccer coach, and as an instructional coach in San Antonio ISD, South San Antonio ISD, and Southwest ISD.

In an at-large election where the top two vote-takers win, incumbent Nathan Filinger, an IT architect at USAA took 33.52% of the vote, and incumbent Blane Nash, a former firefighter and paramedic, took 30.82%.

The two challengers, social studies teacher Andrew Carawan and Northside ISD academic dean Toby Castillo Walters, took 15.75% and 19.91%, respectively.

Castillo Walters ran unsuccessfully for a position on the board in 2025.

Incumbents hold onto seats in Medina Valley ISD board races

Toby ran unsuccessfully for a position on the Medina Valley Independent School District board in 2025.

Toby Castillo Walters | 2026 candidate for Medina Valley ISD Board ...

Toby currently works as an academic dean in Northside Independent School District and as an adjunct English instructor in the Alamo Colleges District.

Medina Valley ISD had three trustee seats up for election, and two of the three races were competitive. In Single Member District 1, Benito Juarez and Al Anaya ran to fill a two-year unexpired term. Ben Juarez was appointed to the position last May to fill a vacancy. Juarez won the race by less than 10 votes. In Single Member District 3, incumbent Matt Castiglione was challenged by Toby Castillo Walters. Castiglione won re-election by less than 15 votes.

Toby previously ran for the Medina Valley Independent School District board in Single Member District 3, but did not win.

4 Medina Valley ISD residents seek 2 school-board posts

Toby Castillo Walters works as an academic dean at Northside Independent School District and as an adjunct English instructor in the Alamo Colleges District.

Medina Valley ISD had three trustee seats up for election, and two of the three races were competitive. In Single Member District 3, incumbent Matt Castiglione was challenged by Toby Castillo Walters. Castiglione won re-election by less than 15 votes.

Toby previously ran for the Medina Valley Independent School District Board of Trustees but did not win.

Plans to ensure fiscal responsibility in the school district.

Plans to foster collaboration among parents, teachers, and administrators.

Toby Castillo Walters works as an academic dean in the Northside Independent School District and as an adjunct English instructor in the Alamo Colleges District.

Medina Valley ISD had three trustee seats up for election, and two of the three races were competitive.

In Single Member District 3, incumbent Matt Castiglione was challenged by Toby Castillo Walters. Castiglione won re-election by less than 15 votes.

Toby previously ran for Medina Valley Independent School District trustee in Single Member District 3 but did not win.

Toby Castillo Walters holds a master's degree in bilingual education and a doctorate in education. He lives just outside San Antonio's city limits.

Toby Castillo Walters is an academic dean at Northside Independent School District and an adjunct English instructor in the Alamo Colleges District.

Toby previously ran for the Medina Valley Independent School District board.

Toby Castillo Walters currently works as an academic dean at Northside Independent School District and as an adjunct English instructor in the Alamo Colleges District.

Toby previously ran for the Medina Valley Independent School District trustee seat for Single Member District 3 but did not win.

Mauricio Mendez

Buket Urgen

Andrew Carawan

Blane Nash

Nathan Fillinger

- A trustee is an elected member of a local school board who helps govern a public school district.

- Trustees represent community interests and are responsible for setting policies that guide how the school district operates.

- The board of trustees hires and evaluates the superintendent, who manages the day-to-day operations of the district.

- Trustees approve the district’s budget, monitor spending, and may set the local tax rate or call for bond elections to fund schools.

- The board also oversees educational programs, district goals, and overall performance.

- In Texas, trustees are elected to four-year terms, often on a rotating basis, so not all seats are elected at the same time.

- Trustees serve without financial compensation.

An official who sets policy for a local school district. 