首席仲裁员

首席的英语翻译：

chief; doyen; seat of honour
【法】 doyen

仲裁的英语翻译：

arbitrament; arbitration; intercede; intercession; intermediation; mediation
referee; umpire
【经】 arbitrate; arbitration

员的英语翻译：

a person engaged in some field of activity; member