The Business Operation Support_ AR Service role supports contract administration, accounts receivable invoicing, risk monitoring, and financial data management. The position creates and modifies contracts in SAP, prepares and compiles supporting documents, and coordinates with contract support and service teams to maintain business records. It issues and cancels invoices in SAP, processes internal accounts payable transactions for headquarters, and delivers invoices to clients by email or through client portals. The role also supports month-end closing by confirming data with the IT-Finance team, monitoring open invoices and related risks, and producing and analyzing aged accounts receivable reports. It uses advanced Excel functions to cleanse, analyze, and present data; prepares recurring and ad hoc reports such as account balances and cash flow; and creates or modifies client and vendor master data. Korean and English bilingual communication is required, with collaboration involving service teams, clients, and headquarters.