Mostyn is a U.S. Army veteran and Department of Defense-certified master instructor who also works as a Realtor and small business owner in San Antonio.
He ran for this same seat in 2024 and lost to Cortez in the general election; he is running again in 2026.
Mostyn’s take on Texas values
Mostyn's campaign platform centers on securing the southern border, saying it is "being overrun by illegal immigrants, lethal drugs, and foreign actors" and pledging to help secure it. [campaign website; Ballotpedia]