soldier for hire

A mercenary is a soldier for hire, who is not loyal to any particular government, group, or ideology.

It was in 2009, as he became enmeshed in the chummy, macho world of contract security work, that another soldier for hire introduced him to a charismatic businessman named Paul Le Roux, according to Mr. Hunter’s sister.

But he’s no soldier for hire, and the team is not a group of private military contractors.

But he's no soldier for hire, and the team is not a group of private military contractors.

But he's just a soldier for hire, or a star looking for his next project.