I have the experience in billing from my data analysis background, specifically for utilities, and also from being in customer service. I used MS DOS in checking customer's bills, and SAP in checking consumptions before invoicing. I also used to take inbound calls for e-commerce and telecommunications where I do sales, retention, and customer support.
Here are the tools I am familiar with:
- Microsoft Excel
- CRM
- SAP
- Citrix
- MS DOS
- Cisco
- Avaya