accountant

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun One that keeps, audits, and inspects the financial records of individuals or business concerns and prepares financial and tax reports.

from The Century Dictionary.

• noun One who is skilled in or who keeps accounts; one who makes the keeping or examination of accounts his profession; an officer in a public office who has charge of the accounts. Also spelled accomptant.
• Giving account; accountable; responsible.

from the GNU version of the Collaborative International Dictionary of English.

• adjective obsolete Accountable.
• noun One who renders account; one accountable.
• noun A reckoner.
• noun One who is skilled in, keeps, or adjusts, accounts; an officer in a public office, who has charge of the accounts.
• noun the head or superintending accountant in certain public offices. Also, formerly, an officer in the English court of chancery who received the moneys paid into the court, and deposited them in the Bank of England.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• adjective obsolete accountable
• noun One who renders account; one accountable.
• noun A reckoner, or someone who maintains financial matters for a person(s)
• noun accounting One who is skilled in, keeps, or adjusts, accounts; an officer in a public office, who has charge of the accounts.
• noun accounting One whose profession includes organizing, maintaining and auditing the records of another. The records are usually, but not always, financial records.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun someone who maintains and audits business accounts