Tex. Labor Code § 105.003

An employee who was employed by an employer under an employment contract on the date of the employee's termination and who believes the employee was wrongfully terminated under Section 105.002 may bring suit against the employer in a district court in the county in which the termination occurred for appropriate relief, including rehiring or reinstatement to the employee's previous job, payment of back wages, and reestablishment of employee benefits to which the employee otherwise would have been eligible if the employee had not been terminated.