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 2018 ASE test administration). This list is updated once a year in December.

Please note in addition, there are 85,671 students who hold current ASE Entry Level certification.

Automobile Technicians 183,302
Service Consultants 16,143
Maintenance/Light Repair Technicians 21,789
Advanced Engine Performance Specialists 32,291
Collision Repair/Refinish Technicians 13,536
Collision Damage Estimators 4,791
Medium/Heavy Truck Technicians 31,842
Truck Equipment Installation & Repair Technicians 2,447
Compressed Natural Gas Technicians 1,557
Transit Bus Technicians 3,438
School Bus Technicians 4,148
Parts Specialists 23,487
Net Total Service Professionals 247,621
Note:  “Net Total” means individuals with multiple certifications are counted only once.  
Master Automobile Technicians 63,938
Master Collision Repair/Refinish Technicians 3,091
Master Medium/Heavy Truck Technicians 9,816
Master Medium/Heavy Vehicle Technicians 1,030
Master Truck Equipment Technicians 1,090
Master Transit Bus Technicians 885
Master School Bus Technicians 1,367
Automobile Series  
A1: Engine Repair 109,904
A2: Automatic Transmission Transaxle 81,352
A3: Manual Drive Train and Axles 89,050
A4: Suspension and Steering 131,469
A5: Brakes 141,119
A6: Electrical/Electronic Systems 115,810
A7: Heating and Air Conditioning 104,859
A8: Engine Performance 103,212
A9: Light Vehicle Diesel Engines 17,094
Maintenance/Light Repair Series  
G1: Auto Maintenance and Light Repair 21,789
Medium/Heavy Truck Series  
T1: Gasoline Engines 9,074
T2: Diesel Engines 19,230
T3: Drive Train 15,325
T4: Brakes 21,112
T5: Suspension and Steering 16,473
T6: Electrical/Electronic Systems 17,418
T7: Heating, Ventilation & A/C 15,836
T8: Preventive Maintenance Inspection 17,916
Truck Equipment Installation and Repair Series  
E1: Truck Equipment Installation and Repair Specialist 1,742
E2: Electrical/Electronic Systems Installation and Repair 1,702
E3: Auxilary Power Systems Installation and Repair 1,574
Collision Repair and Refinish Series  
B2: Painting and Refinishing 7,576
B3: Non-Structural Analysis and Damage Repair 6,650
B4: Structural Analysis and Damage Repair 5,779
B5: Mechanical and Electrical Components 7,647
Damage Analysis and Estimating  
B6: Damage Analysis and Estimating 4,791
Alternate Fuels Series  
F1: Compressed Natural Gas Vehicle 1,557
Advanced Level Series  
L1: Automobile Advanced Engine Performance Specialist 32,291
L2: Medium/Heavy Vehicle Electronic Diesel Engine Diagnosis Specialist 3,765
L3: Light Duty Hybrid/Electric Vehicle Specialist 1,574
Transit Bus Series  
H1: Compressed Natural Gas (CNG) Engines 695
H2: Diesel Engines 1,602
H3: Drive Train 1,573
H4: Brakes 2,227
H5: Suspension & Steering 1,816
H6: Electrical/Electronic Systems 1,560
H7: Heating, Ventilation & A/C 1,556
H8: Preventive Maintenance and Inspection 1,818
School Bus Series  
S1: Body Systems and Special Equipment 2,358
S2: Diesel Engines 2,110
S3: Drive Train 2,161
S4: Brakes 3,136
S5: Suspension and Steering 2,261
S6: Electrical/Electronic Systems 2,183
S7: Air Conditioning System and Controls 1,211
Service Consultant Series  
C1: Automobile Service Consultant 16,143
Specialty Tests  
X1: Exhaust Systems 5,815
Parts Specialist Series  
P1: Medium/Heavy Truck Parts Specialist 1,532
P2: Automobile Parts Specialist 21,931
P4: General Motors Parts Consultant 1,043