JM3 (Hunter / Padawan / Yeoman / Lieutenant) is the seventh rank in the Dark Brotherhood, which is awarded after completing the requirements of a JM2 (Acolyte / Courier / Sergeant)]].
It is part of the Journeyman class, and the final step down the path to Knight / Professional / Captain.
Sub-Unit-Aediles and Rollmasters 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 JM3 are found at the above link, the completion of the above requirements will earn a promotion to JM4 (Knight/Professional/Captain).