Levites were Overseers in Building and the Repairs of the Temple
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1 Chronicles 23:2–4
Then he gathered all the leaders of Israel, as well as the priests and Levites. / The Levites thirty years of age or older were counted, and the total number of men was 38,000. / “Of these,” said David, “24,000 are to oversee the work of the house of the LORD, 6,000 are to be officers and judges,
Ezra 3:8, 9
In the second month of the second year after they had arrived at the house of God in Jerusalem, Zerubbabel son of Shealtiel, Jeshua son of Jozadak, and the rest of their associates including the priests, the Levites, and all who had returned to Jerusalem from the captivity, began the work. They appointed Levites twenty years of age or older to supervise the construction of the house of the LORD. / So Jeshua and his sons and brothers, Kadmiel and his sons (descendants of Yehudah), and the sons of Henadad and their sons and brothers—all Levites—joined together to supervise those working on the house of God.