《異動(いどう)》公務員(こうむいん)「今週(こんしゅう)限(かぎ)りで、現在(げんざい)の職務(しょくむ)から離(はな)れることになりました。」
Changes in personnel, civil servant: "I will be leaving my current position as of this week."
If 職を離れる were used then the nuance would be that the civil servant will quit the job. However, in this case it is likely a reshuffling of the government personnel