(n.) One skilled in strategy, or the science of directing great military movements.

Machiavellian a architect behind-the-scenes operator calculator contriver designer developer deviser eminence grise enterpriser entrepreneur finagler framer gamesman gray eminence intriguer kingmaker logroller machinator maneuverer manipulator operator organizer planner pork-barrel politician projector promoter schemer strategian tactician wheeler-dealer wire-puller