I have attained the following          certifications:

Master Automobile Technician

Master Autobody/Paint Technician

A1 Engine Repair B2 Painting and Refinishing
A2 Automatic Transmission/Transaxle B3 Non-Structural Analysis & Damage Repair
A3 Manual Drive Train and Axles B4 Structural Analysis and Damage Repair
A4 Suspension and Steering B5 Mechanical and Electrical Components
A5 Brakes  I also passed the "Body Shop Estimator" test, but I don't have 2 years experience in that field.
A6 Electrical/Electronic Systems

Master Engine Machinist

A7 Heating and Air Conditioning M1D Diesel Engine Cylinder Head Specialist
A8 Engine Performance M1G Gasoline Engine Cylinder Head Specialist
A9 Light Vehicle Diesel M2D Diesel Engine Cylinder Block Specialist
L1 Automobile Advanced Engine Performance Specialist M2G Gasoline Engine Cylinder Block Specialist
  M3D Diesel Engine Assembly Specialist

Medium/Heavy Duty Truck Technician

M3G Gasoline Engine Assembly Specialist
T1 Gasoline Engines  
T2 Diesel Engines

School Bus Technician

T3 Drive Train S2 Diesel Engines
T4 Brakes S3 Drive Train
T5 Suspension and Steering S4 Brakes
T7 Heating, Ventilation and A/C S5 Suspension and Steering
  S6 Electrical/Electronic Systems
  S7 Heating, Ventilation and A/C