There are multiple jonins able to be the proctor for the genin & chunin exams.
Jonins & one chunin:
Genma
Raido
Yamato
Minato
Idao
Baki
Wasui
Memimira
hayate
Tikuro
Shikamaru..,,
Nex
Neo
(If your name is called send temari a message on gaia saying you want to be part of the genin or'' and'' chunin exams.And you will become a proctor or a guide.Even a spy on many.