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Invoice Billing & Vendor Coordinator (EST Hours) - Remote at ISTA Personnel Solutions. ISTA Personnel Solutions. . South Africa - . we are a global BPO company, partnering with a . US-based Waste Services Brokerage Company.. We’re looking for a . detail-oriented Invoice Billing & Vendor Coordinator. who will play a critical role in identifying billing errors, correcting discrepancies with subcontractors, and supporting clean, timely invoicing to clients.. This is a back-office, admin-heavy role that requires . precision, follow-through, and clear communication. — especially when coordinating with multiple vendors and cross-checking records.. PLEASE NOTE: . . . Working Hours:. . This role requires you to work in USA hours . Mon - Fri . from 9am to 6pm EST (. 15h00pm to midnight South African time. , however these hours are subject to change depending on daylight savings).. . . . Work Environment:. . This is a remote role for South African Citizens only.. . . . Internet Requirements:. A . fixed fibre line. with a minimum speed of . 25 Mbps (upload & download). and the ability to support a . wired Ethernet connection. is mandatory. . Applicants without a fixed fibre line cannot be considered.. . . . Power Backup:. A . reliable power backup solution. is required to manage . load shedding and power outages. . . Applicants without a power backup cannot be considered.. . . Key Responsibilities:. . Review third-party vendor invoices for pricing, unit, or service errors. . . Match vendor invoices to internal order records. . . Follow up with vendors to resolve discrepancies and request revised invoices. . . Use . QuickBooks. (or similar accounting system) to support billing workflows. . . Assist in preparing accurate client invoices based on validated vendor data. . . Store and manage service contracts in . Hubspot. . . . Send onboarding/welcome emails to new clients. . . Handle basic collections (light follow-ups to ensure invoice processing).. . . . Experience in invoice verification. , . billing reconciliation. , and . vendor follow-ups. . . Strong understanding of invoice processing, vendor reconciliation, and billing accuracy . . Familiarity with . QuickBooks. (or equivalent accounting software) . . Excellent attention to detail and high accountability . . Strong written and verbal communication skills . . If you are not contacted within 14 working days, please consider your application unsuccessful. . Company Location: South Africa.