How can I become certified to conduct truck inspections (annual DOT inspections)?

There is no requirement to be licensed to do truck inspections, but you must be certified. Requirements can be found in 49 CFR Part 396.19. Basically, you must complete a training program, have experience as a mechanic, or a federal or state inspector or similar experience. The inspector must also be familiar with Parts 393, 396, and Appendix G of the Federal Regulations. Forms for conducting the inspections can be obtained through motor carrier associations, truck stops, etc.