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 2022 ASE test administration). This list is updated once a year in July.

Please note in addition, there are 57,002 students who hold current ASE Entry-Level certification.

Automobile Technicians183,082
Service Consultants12,954
Maintenance/Light Repair Technicians20,421
Advanced Engine Performance Specialists27,251
Collision Repair/Refinish Technicians10,019
Collision Damage Estimators3,465
Medium/Heavy Truck Technicians27,590
Truck Equipment Installation & Repair Technicians2,178
Compressed Natural Gas Technicians1,460
Transit Bus Technicians3,303
School Bus Technicians4,186
Parts Specialists12,133
Military Technicians252
Net Total Service Professionals229,635
Note: “Net Total” means individuals with multiple certifications are counted only once.
Master Automobile Technicians56,928
Master Collision Repair/Refinish Technicians2,343
Master Medium/Heavy Truck Technicians8,636
Master Medium/Heavy Vehicle Technicians858
Master Truck Equipment Technicians848
Master Transit Bus Technicians861
Master School Bus Technicians1,264
Master Military Tactical Wheeled Vehicle Technicians21
Automobile Series
A1: Engine Repair109,707
A2: Automatic Transmission Transaxle82,532
A3: Manual Drive Train and Axles89,951
A4: Suspension and Steering132,979
A5: Brakes141,753
A6: Electrical/Electronic Systems117,553
A7: Heating and Air Conditioning104,633
A8: Engine Performance102,567
A9: Light Vehicle Diesel Engines19,568
Maintenance/Light Repair Series
G1: Auto Maintenance and Light Repair20,421
Medium/Heavy Truck Series
T1: Gasoline Engines8,214
T2: Diesel Engines17,003
T3: Drive Train13,848
T4: Brakes19,191
T5: Suspension and Steering14,818
T6: Electrical/Electronic Systems15,885
T7: Heating, Ventilation & A/C14,510
T8: Preventive Maintenance Inspection17,462
Truck Equipment Installation and Repair Series
E1: Truck Equipment Installation and Repair Specialist1,520
E2: Electrical/Electronic Systems Installation and Repair1,455
E3: Auxiliary Power Systems Installation and Repair1,390
Collision Repair and Refinish Series
B2: Painting and Refinishing5,686
B3: Non-Structural Analysis and Damage Repair4,834
B4: Structural Analysis and Damage Repair4,287
B5: Mechanical and Electrical Components6,117
Damage Analysis and Estimating
B6: Damage Analysis and Estimating3,465
Alternate Fuels Series
F1: Compressed Natural Gas Vehicle1,152
Advanced Level Series
L1: Automobile Advanced Engine Performance Specialist27,251
L2: Medium/Heavy Vehicle Electronic Diesel Engine Diagnosis Specialist3,679
L3: Light Duty Hybrid/Electric Vehicle Specialist3,082
Transit Bus Series
H1: Compressed Natural Gas (CNG) Engines668
H2: Diesel Engines1,575
H3: Drive Train1,490
H4: Brakes2,201
H5: Suspension & Steering1,732
H6: Electrical/Electronic Systems1,568
H7: Heating, Ventilation & A/C1,552
H8: Preventive Maintenance and Inspection1,834
School Bus Series
S1: Body Systems and Special Equipment2,360
S2: Diesel Engines2,081
S3: Drive Train2,019
S4: Brakes3,253
S5: Suspension and Steering2,136
S6: Electrical/Electronic Systems2,013
S7: Air Conditioning System and Controls1,146
Service Consultant Series
C1: Automobile Service Consultant12,954
Specialty Tests
X1: Exhaust Systems4,608
Parts Specialist Series
P1: Medium/Heavy Truck Parts Specialist1,210
P2: Automobile Parts Specialist10,969
P4: General Motors Parts Consultant805
Military Tests
MIL2: Diesel Engines188
MIL3: Drive Train32
MIL4: Chassis28
MIL5: Suspension, Steering, and Hydraulics30
MIL6: Electrical / Electronics181
MIL7: Heating, Ventilation, and Air Conditioning (HVAC) Systems33

MIL8: Preventive Maintenance Checks and Services (PMCS)