Were can you apply for a TWIC card in the rio grande valley?

There are two locations in the Rio Grande Valley where you can apply for a TWIC card:

Brownsville

Transportation Security Administration (TSA)

Brownsville/South Padre Island International Airport

Terminal A, Suite 106

Brownsville, TX 78521

McAllen

Transportation Security Administration (TSA)

McAllen/Miller International Airport

Terminal B, Suite 204

McAllen, TX 78503

You can also find a list of all TWIC card application centers in the United States on the TSA website.