n. A person knowledgeable about the law, accounting, and regulation affecting budgets, especially governmental.
The Century Dictionary and Cyclopedia
n. One who makes up a budget, as the chancellor of the exchequer of Great Britain when he presents his financial statement for the year.
Word Usage
"We're told that Laura Tyson, who chaired the Council of Economic Advisers in the Clinton administration, may be the front-runner, but she's more a big-picture economist than a detailed budgeteer."