Senior Technical Specialist

ROLE PURPOSE The Senior Technical Specialist: FTTH Assurance, Fixed Billing & Billing CoE is responsible for end-to-end revenue assurance execution and technical oversight across FTTH and fixed billing environments. The role ensures accuracy, completeness, and integrity of billing and revenue processes through the design, execution, and continuous enhancement of assurance controls. The incumbent acts as a technical subject-matter expert, driving advanced data analysis, root-cause investigation, and revenue leakage mitigation, while supporting both operational delivery and strategic decision-making. The role requires advanced SQL capability, deep understanding of telecom billing architectures, and strong stakeholder engagement across Nexio and client environments. ROLE REQUIREMENT Revenue Assurance & Leakage Management Execute end-to-end revenue assurance activities across FTTH and fixed billing domains. Identify, investigate, quantify, and remediate revenue leakage risks. Design, implement, and maintain preventive and detective assurance controls. Drive recovery initiatives and track financial impact of identified issues. Control Management & BAU Execution Own BAU execution and monitoring of assurance control frameworks. Ensure controls operate consistently across systems, products, and billing cycles. Partner with DevOps and IT teams to automate assurance controls where feasible. Data Analysis & Technical Execution Perform advanced data extraction, validation, and analysis using Oracle / Teradata SQL. Develop and maintain scripts to support reconciliations, reporting, and investigations. Validate data integrity across source systems, mediation, and billing platforms. Produce dashboards and reports highlighting trends, risks, and control performance. Root Cause Analysis & Resolution Conduct detailed root-cause analysis on billing mismatches and anomalies. Drive cross-functional resolution with IT, Operations, and Finance teams. Implement preventative measures to avoid recurrence of issues. Process & System Improvement Analyse business processes and data models to identify risk points. Contribute to solution design, prototypes, and enhancements with Data Enablement teams. Continuously improve assurance methodologies and tooling. Stakeholder Engagement & Reporting Engage with internal stakeholders and clients to communicate findings and risks. Prepare and present assurance insights to senior management. Escalate critical issues timeously and track resolution to closure. Technical Mentorship Provide technical guidance and informal mentorship to junior assurance analysts. Contribute to capability uplift and knowledge sharing within the Billing CoE. PROFESSIONAL COMPETENCIES Analytical and investigative thinking Strong attention to detail Accountability and ownership Stakeholder influence and communication Ability to operate independently in complex environments QUALIFICATIONS & EXPERIENCE Matric Diploma or degree in Information Technology, Computer Science, or related field. Post graduate qualification in Management, IT or related field advantageous. 710 years relevant experience in: Revenue Assurance, Billing Operations, or Financial Control within a similar environment. Advanced SQL-based data analysis and investigations. Complex, multi-system billing landscapes. Knowledge and understanding of Telecommunications business operations and in-depth technical (network & systems / order management) capabilities. SQL Advanced Certification and experience Essential (i.e. Oracle PL/SQL / T-SQL / Informix). Knowledge and experience of RA / BA Operations with Telecom Operator. Experience in financial and/or operational auditing / investigations methodologies and tools. Experience in business process analysis, modelling and re-engineering. Knowledge of IT or system audit and data analysis experience. Siebel and other SRM related systems experience. Strong analytical and technical abilities. Knowledge of Product Development Processes. Advanced computer skills with Microsoft Office Suite.