2 sentences for 领队 (lǐng​duì — leader)

1. 原先生是我们的领队。

   Yuán xiān​sheng shì wǒ​men de lǐng​duì.

   Mr. Yuan is our team leader.

   Source: Dong Chinese Dictionary

2. 旅游团的领队正在清点人数。

   lǚ​yóu​tuán de lǐng​duì zhèng​zài qīng​diǎn rén​shù.

   The tour group leader is counting the number of people.

   Source: Dong Chinese Dictionary