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 Fall 2013 ASE test administration). This list is updated twice a year, in January and July.

Automobile Technicians 232,059
Service Consultants 16,243
Maintenance/Light Repair Technicians 3,672
Advanced Engine Performance Specialists 38,007
Collision Repair/Refinish Technicians 21,805
Collision Damage Estimators 7,716
Medium/Heavy Truck Technicians 38,582
Truck Equipment Installation & Repair Technicians 2,753
Engine Machinists 1,260
Compressed Natural Gas Technicians 1,983
Transit Bus Technicians 3,036
School Bus Technicians 4,825
Parts Specialists 46,514
Net Total Service Professionals 325,906
Note:  “Net Total” means individuals with multiple certifications are counted only once.  
Master Automobile Technicians 76,218
Master Collision Repair/Refinish Technicians 4,662
Master Medium/Heavy Truck Technicians 11,894
Master Medium/Heavy Vehicle Technicians 214
Master Truck Equipment Technicians 1,188
Master Engine Machinists 713
Master Transit Bus Technicians 595
Master School Bus Technicians 1,483
Automobile Series  
A1: Engine Repair 137,786
A2: Automatic Transmission Transaxle 97,317
A3: Manual Drive Train and Axles 108,902
A4: Suspension and Steering 161,792
A5: Brakes 177,257
A6: Electrical/Electronic Systems 140,354
A7: Heating and Air Conditioning 130,049
A8: Engine Performance 127,802
A9: Light Vehicle Diesel Engines 14,524
Maintenance/Light Repair Series  
G1: Auto Maintenance and Light Repair 3,672
Medium/Heavy Truck Series  
T1: Gasoline Engines 11,099
T2: Diesel Engines 23,080
T3: Drive Train 18,501
T4: Brakes 25,505
T5: Suspension and Steering 19,442
T6: Electrical/Electronic Systems 21,332
T7: Heating, Ventilation & A/C 18,361
T8: Preventive Maintenance Inspection 18,514
Truck Equipment Installation and Repair Series  
E1: Truck Equipment Installation and Repair Specialist 1,910
E2: Electrical/Electronic S stems Installation and Repair 1,953
E3: Auxilary Power Systems Installation and Repair 1,718
Collision Repair and Refinish Series  
B2: Painting and Refinishing 12,429
B3: Non-Structural Analysis and Damage Repair 11,730
B4: Structural Analysis and Damage Repair 9,853
B5: Mechanical and Electrical Components 10,565
Damage Analysis and Estimating  
B6: Damage Analysis and Estimating 7,716
Alternate Fuels Series  
F1: Compressed Natural Gas Vehicle 1,983
Advanced Level Series  
L1: Automobile Advanced Engine Performance Specialist 38,007
L2: Medium/Heavy Vehicle Electronic Diesel Engine Diagnosis Specialist 3,330
Engine Machinist Series  
M1: Cylinder Head Specialist 1,001
M2: Cylinder Block Specialist 907
M3: Assembly Specialist 980
Transit Bus Series  
H1: Compressed Natural Gas (CNG) Engines 531
H2: Diesel Engines 1,353
H3: Drive Train 1,191
H4: Brakes 1,929
H5: Suspension & Steering 1,377
H6: Electrical/Electronic Systems 1,344
H7: Heating, Ventilation & A/C 1,234
H8: Preventive Maintenance and Inspection 1,465
School Bus Series  
S1: Body Systems and Special Equipment 2,585
S2: Diesel Engines 2,472
S3: Drive Train 2,436
S4: Brakes 3,413
S5: Suspension and Steering 2,778
S6: Electrical/Electronic Systems 2,698
S7: Air Conditioning System and Controls 1,574
Service Consultant Series  
C1: Automobile Service Consultant 16,243
Specialty Tests  
X1: Exhaust Systems 7,456
Parts Specialist Series  
P1: Medium/Heavy Truck Parts Specialist 1,738
P2: Automobile Parts Specialist 45,093
P3: Medium/Heavy Truck Aftermarket Parts Specialist - Brakes 402
P4: General Motors Parts Consultant 773
P9: Medium/Heavy Truck Aftermarket Parts Specialist - Suspension and Steering 301