The ATS Group has the following contractor accreditations :

Class 8:
P1 - Electrical installations in buildings, installations in generating sets, equipment for fire and burglar alarms, telecommunications in buildings and their surroundings, mixed telephony equipment

P2 - Electrical and electromechanical installation of civil engineering and industrial plants and outdoor electrical installations

Class 6:
P3 - Installations of electrical power lines

S1 - Public telephone and telegraph equipment

Class 5:
S4 - Equipment for information processing and process control

Class 4:
T3 - refrigeration equipment