Point man

n.	1.	(Mil.) the lead soldier in a foot patrol under combat conditions.
	2.	a person who takes a conspicuous public position in proposing a new idea or initiating a new policy, who may become a target of criticism for those opposed.

Noun	1.	point man - someone who is the forefront of an important enterprise; "he is the president's point man on economic issues"
	2.	point man - a soldier who goes ahead of a patrol

leader