The Collaborative International Dictionary of English v.0.48:

Dispatcher \Dis*patch"er\, n.
   One who dispatches.
   [1913 Webster]

WordNet (r) 3.0 (2006):

dispatcher
    n 1: the official who signals the beginning of a race or
         competition [syn: starter, dispatcher]
    2: employee of a transportation company who controls the
       departures of vehicles according to weather conditions and in
       the interest of efficient service