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 Winter 2015 ASE test administration). This list is updated twice a year, in January and July.

Automobile Technicians 219,143
Service Consultants 16,228
Maintenance/Light Repair Technicians 8,611
Advanced Engine Performance Specialists 35,951
Collision Repair/Refinish Technicians 20,282
Collision Damage Estimators 6,929
Medium/Heavy Truck Technicians 36,634
Truck Equipment Installation & Repair Technicians 2,668
Engine Machinists 714
Compressed Natural Gas Technicians 1,863
Transit Bus Technicians 3,191
School Bus Technicians 4,482
Parts Specialists 41,000
Net Total Service Professionals 305,618
Note:  “Net Total” means individuals with multiple certifications are counted only once.  
Master Automobile Technicians 72,701
Master Collision Repair/Refinish Technicians 4,291
Master Medium/Heavy Truck Technicians 11,372
Master Medium/Heavy Vehicle Technicians 171
Master Truck Equipment Technicians 1,144
Master Engine Machinists 384
Master Transit Bus Technicians 663
Master School Bus Technicians 1,388
Automobile Series  
A1: Engine Repair 129,338
A2: Automatic Transmission Transaxle 92,019
A3: Manual Drive Train and Axles 102,294
A4: Suspension and Steering 152,557
A5: Brakes 167,003
A6: Electrical/Electronic Systems 132,723
A7: Heating and Air Conditioning 122,503
A8: Engine Performance 120,509
A9: Light Vehicle Diesel Engines 15,077
Maintenance/Light Repair Series  
G1: Auto Maintenance and Light Repair 8,611
Medium/Heavy Truck Series  
T1: Gasoline Engines 10,393
T2: Diesel Engines 21,799
T3: Drive Train 17,326
T4: Brakes 23,943
T5: Suspension and Steering 18,410
T6: Electrical/Electronic Systems 19,940
T7: Heating, Ventilation & A/C 17,567
T8: Preventive Maintenance Inspection 17,696
Truck Equipment Installation and Repair Series  
E1: Truck Equipment Installation and Repair Specialist 1,877
E2: Electrical/Electronic S stems Installation and Repair 1,898
E3: Auxilary Power Systems Installation and Repair 1,665
Collision Repair and Refinish Series  
B2: Painting and Refinishing 11,386
B3: Non-Structural Analysis and Damage Repair 10,784
B4: Structural Analysis and Damage Repair 8,997
B5: Mechanical and Electrical Components 10,034
Damage Analysis and Estimating  
B6: Damage Analysis and Estimating 6,929
Alternate Fuels Series  
F1: Compressed Natural Gas Vehicle 1,863
Advanced Level Series  
L1: Automobile Advanced Engine Performance Specialist 35,951
L2: Medium/Heavy Vehicle Electronic Diesel Engine Diagnosis Specialist 3,274
Engine Machinist Series  
M1: Cylinder Head Specialist 564
M2: Cylinder Block Specialist 504
M3: Assembly Specialist 556
Transit Bus Series  
H1: Compressed Natural Gas (CNG) Engines 546
H2: Diesel Engines 1,406
H3: Drive Train 1,308
H4: Brakes 2,067
H5: Suspension & Steering 1,494
H6: Electrical/Electronic Systems 1,436
H7: Heating, Ventilation & A/C 1,348
H8: Preventive Maintenance and Inspection 1,469
School Bus Series  
S1: Body Systems and Special Equipment 2,412
S2: Diesel Engines 2,272
S3: Drive Train 2,297
S4: Brakes 3,151
S5: Suspension and Steering 2,557
S6: Electrical/Electronic Systems 2,495
S7: Air Conditioning System and Controls 1,415
Service Consultant Series  
C1: Automobile Service Consultant 16,228
Specialty Tests  
X1: Exhaust Systems 7,116
Parts Specialist Series  
P1: Medium/Heavy Truck Parts Specialist 1,807
P2: Automobile Parts Specialist 39,627
P3: Medium/Heavy Truck Aftermarket Parts Specialist - Brakes 220
P4: General Motors Parts Consultant 624
P9: Medium/Heavy Truck Aftermarket Parts Specialist - Suspension and Steering 168