The Collaborative International Dictionary of English v.0.48:

Tactician \Tac*ti"cian\, n. [Cf. F. tacticien.]
   One versed in tactics; hence, a skillful maneuverer; an
   adroit manager.
   [1913 Webster]

WordNet (r) 3.0 (2006):

tactician
    n 1: a person who is skilled at planning tactics

Moby Thesaurus II by Grady Ward, 1.0:

27 Moby Thesaurus words for "tactician":
   a, architect, calculator, campaigner, contriver, designer,
   developer, deviser, enterpriser, entrepreneur, framer, intriguer,
   machinator, maneuverer, manipulator, mastermind, operator,
   orchestrator, organizer, planner, plotter, projector, promoter,
   schemer, strategian, strategist, wire-puller