John Gill Commentary Ezekiel 44:11

"Yet they shall be ministers in my sanctuary, having oversight at the gates of the house, and ministering in the house: they shall slay the burnt-offering and the sacrifice for the people, and they shall stand before them to minister unto them." — Ezekiel 44:11 (ASV)

Yet they shall be ministers in my sanctuary
Though degraded from their office as priests and ministers of the word, yet being restored from their sins and errors, shall have a place in the house of God, and do their work there in a less honourable and a more servile way; as in former times, when ministers had sinned foully, and were degraded from their office, upon repentance they were not restored to that, but only admitted to lay communion; see (2 Kings 23:9) :

having charge at the gates of the house ;
like those sort of Levites who were porters and doorkeepers in the temple, or like our sextons or pew openers now:

and ministering to the house ;
employed as the Gibeonites were in hewing wood and bringing water for the use of the sanctuary, or in repairing of it; learning and exercising the business of smiths, masons, and carpenters:

they shall slay the burnt offering, and the sacrifice for the people ;
not bring it to the altar, and offer it there; only slay it, and skin it for the priests; which is not to be understood literally, there being no such sacrifice in Gospel times; but to denote the menial service and inferior post that such shall be employed in; if they have no trade, they shall learn one, in order to get a livelihood for themselves, and be serviceable to the interest of religion in a lower way; but ministers of the word they shall not be:

and they shall stand before them to minister unto them ;
either before the priests, whose servants they shall be, or before the people; signifying that those that sin publicly shall be rebuked before all.