וְעַל־הַצֹּ֖אן יָזִ֣יז הַֽהַגְרִ֑י כָּל־אֵ֙לֶּה֙ שָׂרֵ֣י הָרְכ֔וּשׁ אֲשֶׁ֖ר לַמֶּ֥לֶךְ דָּוִֽיד׃
und über den Herden war Jaziz der Hagrit. All dies waren die Herrscher der Substanz, die König David war's.
Rashi
And over the flocks was Jaziz the Hagarite Since the Hagarites were tent dwellers in the field, he appointed him over his flocks.