Role/Department + 负责人
The noun 负责人 (fùzérén) means the person in charge, director, or head of something. It combines 负责 (to be responsible for) with 人 (person). It is commonly used in formal and organizational contexts to refer to someone who oversees a particular area.
请问你们部门的负责人是谁?
Qǐngwèn nǐmen bùmén de fùzérén shì shéi?
Excuse me, who is the person in charge of your department?
项目负责人明天会开会讨论新方案。
Xiàngmù fùzérén míngtiān huì kāihuì tǎolùn xīn fāng'àn.
The project manager will hold a meeting tomorrow to discuss the new plan.
她是这次活动的负责人,有什么问题找她就行。
Tā shì zhè cì huódòng de fùzérén, yǒu shénme wèntí zhǎo tā jiù xíng.
She is the person in charge of this event; if you have any questions, just ask her.