Have, make, and get are often used to indicate that one person has the power to force another to do something.
Have and make are followed by a noun or pronoun and an infinitive without to.
He had/made the mechanic fix the car.
Get is followed by a noun or pronoun and a to-infinitive.
He got the mechanic to fix the car.
Have/Get someone do something = Organise/arrange for someone to do something.