Collocations for technician - noun

chief, senior
experienced, skilled
qualified, trained
trainee (BrE)
lab (informal), laboratory
dental, medical
computer
lighting, sound
He works as a sound technician in a recording studio.

ultrasound, X-ray, etc. (esp. AmE)
maintenance, service, support
a computer support technician

ambulance (BrE)

train
a need to train technicians in construction methods