In my company we have personnel changes at the end of every year that any of those who has worked for 3 or 4 years at one department should be transferred to another one.
"毎年度末に人事異動があり、3〜4年で部署の異動をする"
人事異動 personnel changes, staff reshuffle
部署を移動 be transferred to ~
毎年年度末 at the end of every year
In my company we have personnel changes at the end of every year that any of those who has worked for 3 or 4 years at one department should be transferred to another one.
日本 
