disciplinarian

He is the chief disciplinarian in the school.

Miss Brownell had the reputation in Blair Water of being a fine teacher—due mainly to the fact that she was a strict disciplinarian and kept excellent “order.”

Disciplinarian system.

Layla's mother was a strict disciplinarian.

Tom's mother was a strict disciplinarian.

He says his mother Lena was a stern disciplinarian, and would hit him with anything at hand.