The Collaborative International Dictionary of English v.0.48:

Financier \Fin`an*cier"\, v. i. [imp. & p. p. Financiered; p.
   pr. & vb. n. Financiering.]
   To conduct financial operations.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Financier \Fin`an*cier"\ (?; 277), n. [Cf. F. financier.]
   1. One charged with the administration of finance; an officer
      who administers the public revenue; a treasurer. --Burke.
      [1913 Webster]

   2. One skilled in financial operations; one acquainted with
      money matters.
      [1913 Webster]

WordNet (r) 3.0 (2006):

financier
    n 1: a person skilled in large scale financial transactions
         [syn: financier, moneyman]
    v 1: conduct financial operations, often in an unethical manner

Moby Thesaurus II by Grady Ward, 1.0:

28 Moby Thesaurus words for "financier":
   Wall Streeter, angel, backer, banker, baron, big boss,
   big businessman, business leader, businessman, capitalist,
   captain of industry, director, economist, enterpriser,
   entrepreneur, finance capitalist, financial expert, industrialist,
   investor, king, little businessman, magnate, man of commerce,
   manager, moneyman, plutocrat, top executive, tycoon