The Collaborative International Dictionary of English v.0.48:

Maneuverer \Ma*neu"ver*er\, Manoeuvrer \Ma*noeu"vrer\, n.
   One who maneuvers.
   [1913 Webster]

         This charming widow Beaumont is a nanoeuvrer. We can't
         well make an English word of it.         --Miss
                                                  Edgeworth.
   [1913 Webster]

WordNet (r) 3.0 (2006):

maneuverer
    n 1: a person skilled in maneuvering [syn: maneuverer,
         manoeuvrer]