Take a closer look at ASE-certified professionals and their specialties.

Across the country, there are hundreds of thousands of auto professionals who are ASE certified in dozens of specialty areas, including many professionals who are certified in multiple areas. The numbers of professionals currently certified by ASE are shown below (with information accurate through the Spring 2017 ASE test administration). This list is updated once a year in July.

Please note in addition, there are 51,867 students who hold current ASE Student certification.

Automobile Technicians 197,440
Service Consultants 17,494
Maintenance/Light Repair Technicians 18,047
Advanced Engine Performance Specialists 34,598
Collision Repair/Refinish Technicians 16,124
Collision Damage Estimators 5,659
Medium/Heavy Truck Technicians 33,806
Truck Equipment Installation & Repair Technicians 2,509
Compressed Natural Gas Technicians 1,745
Transit Bus Technicians 3,427
School Bus Technicians 4,052
Parts Specialists 29,777
Net Total Service Professionals 270,026
Note:  “Net Total” means individuals with multiple certifications are counted only once.  
Master Automobile Technicians 69,678
Master Collision Repair/Refinish Technicians 3,580
Master Medium/Heavy Truck Technicians 10,665
Master Medium/Heavy Vehicle Technicians 687
Master Truck Equipment Technicians 1,087
Master Transit Bus Technicians 859
Master School Bus Technicians 1,383
Automobile Series  
A1: Engine Repair 119,280
A2: Automatic Transmission Transaxle 87,219
A3: Manual Drive Train and Axles 95,992
A4: Suspension and Steering 141,433
A5: Brakes 153,426
A6: Electrical/Electronic Systems 123,683
A7: Heating and Air Conditioning 113,410
A8: Engine Performance 112,179
A9: Light Vehicle Diesel Engines 17,862
Maintenance/Light Repair Series  
G1: Auto Maintenance and Light Repair 18,047
Medium/Heavy Truck Series  
T1: Gasoline Engines 9,603
T2: Diesel Engines 20,422
T3: Drive Train 16,124
T4: Brakes 22,307
T5: Suspension and Steering 17,314
T6: Electrical/Electronic Systems 18,483
T7: Heating, Ventilation & A/C 16,469
T8: Preventive Maintenance Inspection 17,873
Truck Equipment Installation and Repair Series  
E1: Truck Equipment Installation and Repair Specialist 1,770
E2: Electrical/Electronic S stems Installation and Repair 1,750
E3: Auxilary Power Systems Installation and Repair 1,584
Collision Repair and Refinish Series  
B2: Painting and Refinishing 8,933
B3: Non-Structural Analysis and Damage Repair 7,963
B4: Structural Analysis and Damage Repair 6,916
B5: Mechanical and Electrical Components 8,811
Damage Analysis and Estimating  
B6: Damage Analysis and Estimating 5,659
Alternate Fuels Series  
F1: Compressed Natural Gas Vehicle 1,745
Advanced Level Series  
L1: Automobile Advanced Engine Performance Specialist 34,598
L2: Medium/Heavy Vehicle Electronic Diesel Engine Diagnosis Specialist 3,636
L3: Light Duty Hybrid/Electric Vehicle Specialist 1,584
Transit Bus Series  
H1: Compressed Natural Gas (CNG) Engines 674
H2: Diesel Engines 1,622
H3: Drive Train 1,548
H4: Brakes 2,221
H5: Suspension & Steering 1,750
H6: Electrical/Electronic Systems 1,549
H7: Heating, Ventilation & A/C 1,555
H8: Preventive Maintenance and Inspection 1,737
School Bus Series  
S1: Body Systems and Special Equipment 2,295
S2: Diesel Engines 2,102
S3: Drive Train 2,162
S4: Brakes 2,928
S5: Suspension and Steering 2,302
S6: Electrical/Electronic Systems 2,225
S7: Air Conditioning System and Controls 1,289
Service Consultant Series  
C1: Automobile Service Consultant 17,494
Specialty Tests  
X1: Exhaust Systems 6,408
Parts Specialist Series  
P1: Medium/Heavy Truck Parts Specialist 1,703
P2: Automobile Parts Specialist 28,069
P4: General Motors Parts Consultant 1,077