He appears to be the field leader and 2nd in command.

Seo, the field leader for the team assigned to Testani, came running up to her.

Girardi was the field leader when he played, Cone said.

And Ross was so cold, she was likely to prove a poor field leader, alienating the others in the team.

She has been the team's field leader, and began a tempestuous relationship with the character Dingo.

He is field leader when the team is out on missions.

That meant that Chavez was probably a soldier type, maybe a field leader?

He often serves as the field leader of the X-Men.

He soon becomes the team's field leader, a position he will traditionally hold over the years.

Gregory Butler has long been a field leader in this domain.