PetroStreet

Here is a very useful link having consolidated website data of inspection / NDT companies with breif introduction.
http://www.rigzone.com/search/p/services/inspection_testing/

Do share the similar directories for quick reference of inspection engineers.

Regards - Qaisar

Look for the same things here:
http://www.ndt.org/vendor.asp?ObjectID=2992

Find much more here:
http://www.ndt-job.com/ndt-companies.asp