WordNet sense 1 (someone employed to discover and recruit talented persons (especially in the worlds of entertainment or sports)):

talent scout

WordNet sense 2 (someone who can find paths through unexplored territory):

guide, pathfinder

WordNet sense 3 (a person employed to watch for something to happen):

lookout, picket, sentinel, sentry, spotter, watch, lookout man

WordNet sense 4 (explore, often with the goal of finding something or somebody):

reconnoiter, reconnoitre