noun
paying teller; payroll clerk; cashier
Refers to a person in charge of disbursements or payroll in an organization. The exact English title depends on the workplace context.
彼は会社の支出係として給与の支払いを担当している。
He is in charge of salary payments as the company's payroll clerk.
支出係の窓口で現金を受け取った。
I received cash at the paying teller's window.
出納係 is a cashier or teller who handles both receipts and disbursements; 支出係 focuses only on payments.
Compound of 支出 (ししゅつ, 'expenditure') and 係 (がかり, 'person in charge').