Wiktionary
group leader
n. An individual in charge of a group of people.
Usage examples of "group leader".
The Spidlarian group leader stands in his stirrups for a moment to survey the forces moving along the road.
I was trying to get close to the brother of a survivalist group leader.
The people still outside the gate were laughing and sounding catcalls, making me need to raise my voice a little as I passed the group leader.