Squad Leader, Honcho, Team Leader, Group Leader
noun
The squad leader is the squad leader. Can also be the honcho (ever wonder where this word came from?).
はんちょう
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
彼は社交的でみんなから好かれているので、班長に選ばれました。
He is sociable and everyone likes him, so he was elected to be the team leader.