3 sentences

1. 公司领导层换人了。

   gōng​sī lǐng​dǎo​céng huàn​rén le.

   There has been a change in the company's leadership.

   Source: Dong Chinese Dictionary

2. 领导层正在谋划企业的转型之路。

   lǐng​dǎo​céng zhèng​zài móu​huà qǐ​yè de zhuǎn​xíng zhī lù.

   The leadership is planning the path for the enterprise's transformation.

   Source: Dong Chinese Dictionary

3. 新领导层上任后，立即对贪腐官员进行了大规模清洗。

   xīn lǐng​dǎo​céng shàng​rèn hòu, lì​jí duì tān​fǔ guān​yuán jìn​xíng le dà​guī​mó qīng​xǐ.

   After taking office, the new leadership immediately carried out a large-scale purge of corrupt officials.

   Source: Dong Chinese Dictionary