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Ernesto Perez

@ernestoperez2

Message

I improve telecom billing accuracy, systems, and technical operations.

Canada

Message

I've spent 18+ years improving telecom billing operations at CTE Telecom SA De CV, resolving billing and tariff issues with 99.99% accuracy and reducing rejected traffic by 40% across six countries.

I led quality billing operations, supported KPI-driven decisions, and helped migrate billing systems and integrate newly acquired companies, including Claro Panama's transition from external to internal systems.

Earlier, I reduced customer invoice errors by 70%, cut unbillable roaming and call traffic losses by 30%, and maintained Oracle databases and Unix/Linux billing environments. I also bring Office 365, Power BI Desktop, JavaScript, React, HTML, and CSS skills.

Experience

Work history, roles, and key accomplishments

Quality Billing Operations Coordinator

CTE Telecom SA De CV

Jun 2013 - Sep 2023 (10 years 3 months)

Managed quality billing operations, achieving a 99.99% accuracy rate and a 40% reduction in rejected traffic. Provided critical support to management by analyzing KPIs and assisted in system migrations and integrations.

Billing Operations Quality Assurance KPI Analysis System migration Team Management Customer Service

Regional Analyst of Mobile Billing Department

CTE Telecom SA De CV

Jan 2010 - Jun 2013 (3 years 5 months)

Expedited the migration of billing systems from an external company in Honduras to internal systems in 6 months. Reduced errors in customer final invoices by 70% across six countries and implemented product enhancements.

Billing Systems System migration CRM Support Product Enhancement Data Analysis

Systems Analyst

CTE Telecom SA De CV

Oct 2005 - Dec 2010 (5 years 2 months)

Reduced unbillable traffic losses in roaming and other call types by 30%. Enhanced CRM application performance, managed Oracle database updates, and handled Unix/Linux systems for call traffic rating and billing.

Oracle Database Linux Unix CRM Billing Systems Data Management Troubleshooting