N-COUNT
（某一体系、活动等的）监督人，监管人，负责人
If a person or organization is the overseer of a particular system or activity, they are responsible for making sure that the system or activity works properly and is successful.
例句
...the department's dual role as overseer of oil production and safety.
该部门作为监管石油生产与安全的机构的双重身份