Jedi Hunter is the seventh rank in the Dark Brotherhood, which is awarded after completing the requirements of a Guardian.
It is part of the Journeyman class, and the final step down the path to Dark Jedi Knight.
Sub-Unit-Aediles have the authority to promote up to this rank.
The Requirements to be promoted past this rank are as follows:
The requirements for the promotion from Jedi Hunter are found at the above link, the completion of the above requirements will earn a promotion to Dark Jedi Knight.