You can visit the ASNT web site and check their listing for individuals that are ASNT certified Level III.
Go to "Certification" at:
http://www.asnt.org/certification/cert/intro.cfm You can search their data bank for people listed in the DFW area. The list can be searched by name or by state. It is much more user friendly than the AWS site for CWI/SCWIs. I even found my name listed with my certifications. If I can use it, anyone can.
Best regards - Al