局长 (júzhǎng) is a noun meaning "director" or "bureau chief." It refers to the head of a government bureau or department, and is a common official title in Chinese administrative systems.
新任局长上个月才到任。
Xīn rèn júzhǎng shàng gè yuè cái dào rèn.
The new bureau director only took office last month.
局长在会议上宣布了改革方案。
Júzhǎng zài huìyì shàng xuānbù le gǎigé fāng'àn.
The bureau director announced the reform plan at the meeting.
你知道现在的教育局局长是谁吗?
Nǐ zhīdào xiànzài de jiàoyùjú júzhǎng shì shéi ma?
Do you know who the current director of the Education Bureau is?