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LORENA CASTILLO has extensive experience as a Finance Officer, handling payroll processes, payments to suppliers and staff expenses, reconciliation of accounts, and adjustment of accounting records. Prior to their current role at Optalert Limited, LORENA worked at PERNINE LTDA as an Analyst in accounting and at SOLISA LTDA in a similar capacity. LORENA's responsibilities included treasury operations, invoice processing, tax calculations, and financial analysis.