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 2023 ASE test administration). This list is updated once a year in July.

Please note in addition, there are 67,851 students who hold current ASE Entry-Level certification.

Automobile Technicians178,426
Service Consultants

11,699

Maintenance/Light Repair Technicians

20,229

Advanced Engine Performance Specialists

25,820

Collision Repair/Refinish Technicians

9,037

Collision Damage Estimators

3,017

Medium/Heavy Truck Technicians

26,594

Truck Equipment Installation & Repair Technicians

1,980

Compressed Natural Gas Technicians

1,029

Transit Bus Technicians

3,216

School Bus Technicians

4,070

Parts Specialists

10,328

Military Technicians619
Net Total Service Professionals

221,933

Note: “Net Total” means individuals with multiple certifications are counted only once.
Master Automobile Technicians

54,809

Master Collision Repair/Refinish Technicians

2,097

Master Medium/Heavy Truck Technicians

8,307

Master Medium/Heavy Vehicle Technicians

767

Master Truck Equipment Technicians

773

Master Transit Bus Technicians

853

Master School Bus Technicians

1,197

Master Military Tactical Wheeled Vehicle Technicians

57

Automobile Series
A1: Engine Repair

103,733

A2: Automatic Transmission Transaxle

78,178

A3: Manual Drive Train and Axles

85,216

A4: Suspension and Steering

126,036

A5: Brakes

133,607

A6: Electrical/Electronic Systems

111,981

A7: Heating and Air Conditioning

99,211

A8: Engine Performance

96,796

A9: Light Vehicle Diesel Engines

19,184

Maintenance/Light Repair Series
G1: Auto Maintenance and Light Repair

20,229

Medium/Heavy Truck Series
T1: Gasoline Engines

7,710

T2: Diesel Engines

16,076

T3: Drive Train

13,049

T4: Brakes

18,373

T5: Suspension and Steering

14,034

T6: Electrical/Electronic Systems

15,058

T7: Heating, Ventilation & A/C

13,831

T8: Preventive Maintenance Inspection

16,644

Truck Equipment Installation and Repair Series
E1: Truck Equipment Installation and Repair Specialist

1,342

E2: Electrical/Electronic Systems Installation and Repair

1,325

E3: Auxiliary Power Systems Installation and Repair

1,266

Collision Repair and Refinish Series
B2: Painting and Refinishing

5,104

B3: Non-Structural Analysis and Damage Repair

4,299

B4: Structural Analysis and Damage Repair

3,813

B5: Mechanical and Electrical Components

5,515

Damage Analysis and Estimating
B6: Damage Analysis and Estimating

3,017

Alternate Fuels Series
F1: Compressed Natural Gas Vehicle

1,029

Advanced Level Series
L1: Automobile Advanced Engine Performance Specialist

25,820

L2: Medium/Heavy Vehicle Electronic Diesel Engine Diagnosis Specialist

3,621

L3: Light Duty Hybrid/Electric Vehicle Specialist

3,409

L4: Advanced Driver Assistance Systems

807

Transit Bus Series
H1: Compressed Natural Gas (CNG) Engines

653

H2: Diesel Engines

1,500

H3: Drive Train

1,438

H4: Brakes

2,114

H5: Suspension & Steering

1,656

H6: Electrical/Electronic Systems

1,473

H7: Heating, Ventilation & A/C

1,470

H8: Preventive Maintenance and Inspection

1,796

School Bus Series
S1: Body Systems and Special Equipment

2,204

S2: Diesel Engines

1,969

S3: Drive Train

1,932

S4: Brakes

3,070

S5: Suspension and Steering

2,031

S6: Electrical/Electronic Systems

1,909

S7: Air Conditioning System and Controls

1,094

Service Consultant Series
C1: Automobile Service Consultant

11,699

Specialty Tests
X1: Exhaust Systems

4,211

Parts Specialist Series
P1: Medium/Heavy Truck Parts Specialist

1,147

P2: Automobile Parts Specialist

9,278

P4: General Motors Parts Consultant

712

Military Tests
MIL1: Fundamentals

289

MIL2: Diesel Engines

255

MIL3: Drive Train

84

MIL4: Chassis

73

MIL5: Suspension, Steering, and Hydraulics

78

MIL6: Electrical / Electronics

232

MIL7: Heating, Ventilation, and Air Conditioning (HVAC) Systems

76

MIL8: Preventive Maintenance Checks and Services (PMCS)

128