point man -
someone who is the forefront of an important enterprise; "he is the president's point man on economic issues"
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= antonym
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Wiktionary
Substantiv
point man -
In combat, the soldier who take takes point; the soldier who assumes the first and most exposed position in a combat military formation; the lead soldier/unit advancing through hostile or unsecured territory.
point man -
By extension, a most trusted assistant or associate; the person to whom one would most rely upon.