The ETT Trainee Level I classification offers an entry-level gateway into the electrical testing industry. Typical duties include providing assistance to higher-level technicians, pre- and post-test sequence assembly and disassembly, and performing simple measurements and/or tests under direct supervision. ETT Level 1 Trainees are not fully certified technicians, and require the supervision of a Level 3 ETT Certified Technician or Level 4 Senior Certified Technician.