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 2014 ASE test administration). This list is updated twice a year, in January and July.

Automobile Technicians 223,230
Service Consultants 15,953
Maintenance/Light Repair Technicians 6,322
Advanced Engine Performance Specialists 36,093
Collision Repair/Refinish Technicians 20,685
Collision Damage Estimators 7,104
Medium/Heavy Truck Technicians 37,196
Truck Equipment Installation & Repair Technicians 2,728
Engine Machinists 949
Compressed Natural Gas Technicians 1,865
Transit Bus Technicians 3,065
School Bus Technicians 4,572
Parts Specialists 43,958
Net Total Service Professionals 313,033
Note:  “Net Total” means individuals with multiple certifications are counted only once.  
Master Automobile Technicians 71,871
Master Collision Repair/Refinish Technicians 4,378
Master Medium/Heavy Truck Technicians 11,335
Master Medium/Heavy Vehicle Technicians 185
Master Truck Equipment Technicians 1,170
Master Engine Machinists 522
Master Transit Bus Technicians 601
Master School Bus Technicians 1,414
Automobile Series  
A1: Engine Repair 130,743
A2: Automatic Transmission Transaxle 92,702
A3: Manual Drive Train and Axles 103,553
A4: Suspension and Steering 154,338
A5: Brakes 168,953
A6: Electrical/Electronic Systems 134,415
A7: Heating and Air Conditioning 123,830
A8: Engine Performance 121,480
A9: Light Vehicle Diesel Engines 14,324
Maintenance/Light Repair Series  
G1: Auto Maintenance and Light Repair 6,322
Medium/Heavy Truck Series  
T1: Gasoline Engines 10,571
T2: Diesel Engines 22,049
T3: Drive Train 17,681
T4: Brakes 24,377
T5: Suspension and Steering 18,678
T6: Electrical/Electronic Systems 20,255
T7: Heating, Ventilation & A/C 17,812
T8: Preventive Maintenance Inspection 17,920
Truck Equipment Installation and Repair Series  
E1: Truck Equipment Installation and Repair Specialist 1,878
E2: Electrical/Electronic S stems Installation and Repair 1,943
E3: Auxilary Power Systems Installation and Repair 1,702
Collision Repair and Refinish Series  
B2: Painting and Refinishing 11,703
B3: Non-Structural Analysis and Damage Repair 11,070
B4: Structural Analysis and Damage Repair 9,257
B5: Mechanical and Electrical Components 10,047
Damage Analysis and Estimating  
B6: Damage Analysis and Estimating 7,104
Alternate Fuels Series  
F1: Compressed Natural Gas Vehicle 1,865
Advanced Level Series  
L1: Automobile Advanced Engine Performance Specialist 36,093
L2: Medium/Heavy Vehicle Electronic Diesel Engine Diagnosis Specialist 3,218
Engine Machinist Series  
M1: Cylinder Head Specialist 749
M2: Cylinder Block Specialist 683
M3: Assembly Specialist 728
Transit Bus Series  
H1: Compressed Natural Gas (CNG) Engines 499
H2: Diesel Engines 1,387
H3: Drive Train 1,231
H4: Brakes 1,975
H5: Suspension & Steering 1,403
H6: Electrical/Electronic Systems 1,383
H7: Heating, Ventilation & A/C 1,276
H8: Preventive Maintenance and Inspection 1,403
School Bus Series  
S1: Body Systems and Special Equipment 2,465
S2: Diesel Engines 2,323
S3: Drive Train 2,333
S4: Brakes 3,220
S5: Suspension and Steering 2,616
S6: Electrical/Electronic Systems 2,557
S7: Air Conditioning System and Controls 1,464
Service Consultant Series  
C1: Automobile Service Consultant 15,953
Specialty Tests  
X1: Exhaust Systems 7,191
Parts Specialist Series  
P1: Medium/Heavy Truck Parts Specialist 1,741
P2: Automobile Parts Specialist 42,575
P3: Medium/Heavy Truck Aftermarket Parts Specialist - Brakes 301
P4: General Motors Parts Consultant 700
P9: Medium/Heavy Truck Aftermarket Parts Specialist - Suspension and Steering 221