accountant

One who renders account; one accountable.

A reckoner, or someone who maintains financial matters for a person(s).

(accounting) One who is skilled in, keeps, or adjusts, accounts; an officer in a public office, who has charge of the accounts.

(accounting) One whose profession includes organizing, maintaining and auditing the records of another. The records are usually, but not always, financial records.

(euphemistic) A sex worker, particularly one who does not want to be publicized as one