3 sentences

1. 他在那家公司的人力资源部工作。

   tā zài nà jiā gōng​sī de rén​lì zī​yuán​bù gōng​zuò.

   He works in the human resources department of that company.

   Source: Dong Chinese Dictionary

2. 他在公司的人力资源部担任招聘专员。

   tā zài gōng​sī de rén​lì zī​yuán bù dān​rèn zhāo​pìn zhuān​yuán.

   He works as a recruitment specialist in the company's human resources department.

   Source: Dong Chinese Dictionary

3. 公司人力资源部组织了一场单身青年联谊会。

   gōng​sī rén​lì zī​yuán​bù zǔ​zhī le yī cháng dān​shēn qīng​nián lián​yì​huì.

   The company's HR department organized a social mixer for single young people.

   Source: Dong Chinese Dictionary