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.
He is in charge of salary payments as the company's payroll clerk.
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').