• Own all client billing processes, including: Monthly retainers, Project-based billing, Pass-through and reimbursable expenses • Ensure invoices are accurate, detailed, and sent on time • Track payments, manage collections, and follow up on outstanding invoices • Review and reconcile monthly expenses for approximately 30 corporate cardholders • Identify issues and work with employees to resolve them • Manage vendor bills, subscriptions, and recurring expenses • Maintain accurate, up-to-date financial records • Support budgeting, forecasting, and cash flow tracking • Prepare clear financial summaries and reports for leadership • Interface with co-founders and partners on financial questions