As the restructuring executioner, he had to inform the entire department about its dissolution.

executioner 是由动词 execute（执行）加上后缀 -or（表示执行动作的人）构成的名词，字面意思是"执行者"。在商业重组语境中，特指负责执行裁员或部门解散等艰难决策的人。