The ASNT Certification Services LLC NDT Level III program provides third-party certification for nondestructive testing (NDT) personnel whose specific jobs require knowledge of the technical principles underlying the nondestructive tests they perform, witness, monitor, or evaluate. The program provides a system for ASNT NDT Level III certification in NDT in accordance with Recommended Practice No. SNT-TC-1A. The ASNT NDT Level III program is the core certification program for ASNT Certification Services LLC. Inaugurated in early 1977, ASNT NDT Level III certificates are recognized worldwide.