Becoming a field inspector means earning certification in nondestructive testing (NDT) and nondestructive evaluation (NDE) testing methods from a certifying body, or from a company who employs their own field inspectors. There are three levels to certification in nondestructive testing. Level I is most similar to an apprenticeship. Level II brings with it more field experience in your chosen inspection methods. Level III inspectors are authorized to oversee and execute NDT programs.

An independent field inspector is not affiliated with a particular infrastructure company. They work with companies across industries, often specializing in multiple nondestructive testing (NDT) and nondestructive evaluation (NDE) methods for a holistic, well-rounded approach to asset management.