Works closely with management in budgeting, purchasing, and procurement; compiles data to support annual budget development; tracks expenditures, encumbrances, and available balances across divisions; reviews and processes numerous invoices covering multiple divisions and a wide variety of supplies, equipment, and materials that involve different codes; enters data, tracks, and generates reports on expenditures; tracks and adjusts budget for expenditures. Performs a variety of complex and high-level administrative and programmatic support duties, customer service, secretarial tasks, and records processing for a large department; coordinates contracted solid waste services, supports the Environmental Advisory Committee; works independently performing duties requiring the ability to interpret and apply departmental rules and regulations to a variety of situations.