Silvio Reis

Senior Telecom Billing & Revenue Assurance Specialist with 20+ years of deep expertise across Telecom Billing (BSS/OSS), Financial Dispute Investigation, Traffic Data Analysis (CDRs), and Fraud Mitigation. Proven track record of identifying billing discrepancies, analyzing complex network/voice/data traffic, and recovering millions in revenue leakage for global telecommunications operators (Amdocs, WeDo, TIM, NTT Data, Vodafone, Oi). Skilled in SQL-based root-cause analysis, cross-functional stakeholder negotiation, and leveraging AI-assisted workflows to accelerate operational efficiency.

Fully proficient in leading global operations across English, Spanish, and Portuguese environments.

Business Assurance & Senior Systems Specialist at Amdocs (2020-07 – 2026-07)

• Acted as the primary interface for international clients across the US, Peru, and Argentina, translating complex financial and operational billing rules into actionable BSS/OSS technical specifications.
• Led end-to-end investigation and validation of complex cross-system billing data flows, partnering with Data Engineering, Finance, and IT squads to ensure high data integrity across billing platforms.
• Designed AI-assisted requirement engineering workflows using Cursor AI / GenAI, accelerating analysis and documentation cycles by 40%.
• Facilitated continuous cross-functional collaboration and daily synchronization across multicultural teams in Israel, India, Mexico, Guatemala, and Latin America in fluent English and Spanish.

Senior Consultant – Revenue Assurance & Telecom Data at WeDo Technologies (2018-04 – 2020-06)

• Developed and deployed enterprise Revenue Assurance controls on the RAID platform for TIM Brasil (DigiRA Program), eliminating revenue leakage.
• Investigated complex operational and transactional financial data using SQL, Oracle, PL/SQL, and Unix, identifying system exceptions and root causes for billing discrepancies.

Research Data Analyst (Contractor) at O3b Networks (2015-11 – 2017-02)

• Conducted quantitative market and data analysis to evaluate satellite broadband deployment, analyzing market data to drive business decisions.

Network / IT Project Manager – Revenue Assurance Lead at TIM Brasil (2014-01 – 2015-08)

• Managed E2E Revenue Assurance initiatives across WeDo RAID 8, Network Engineering, Core Engineering, Billing (BSCS), Rating (OPSC), and Interconnection teams.
• Mapped master data configurations and operational business rules, establishing key data quality benchmarks and metrics for executive reporting dashboards.
• Performed deep data mining on call/messaging patterns to extract actionable insights and mitigate financial risks.

Senior Consultant – Revenue Assurance & Fraud Specialist at NTT DATA BRASIL (2009-04 – 2013-02)

• Revenue Loss Reduction: Designed and executed business data monitoring strategies that directly generated US$ 100 Million in revenue loss reduction over a 2-year period.
• Fraud & Network Misuse Investigation: Led deep-dive investigations into international high-usage Roaming, Premium Rate Services, International Call Bypass, and SMS/GPRS fraud patterns.
• Traffic Data Reconciliation: Analyzed voice traffic control, recharge/bonus mechanisms, postpaid rejection files, and international roaming CDRs to resolve billing inconsistencies.
• Led the OSS/BSS Service Desk team, overseeing post-launch evaluation of new telecom products across Marketing, Network, and Billing departments.

Billing Consultant at Vodafone (2007-12 – 2008-08)

• Monitored system applications and executed postpaid billing batch processes.
• Performed file system maintenance, troubleshooting, and root-cause data analysis on billing discrepancies.

Senior Financial & Billing Analyst at Oi / Telemar (2001-11 – 2005-06)

• Key Financial Achievement: Decreased invalid postpaid billing registrations from 5% to 0.5%, generating US$ 500,000 in annual savings through automated business rules and data validation workflows.
• Supported the implementation, testing, and troubleshooting of Mediation and Billing systems during company setup.
• Controlled prepaid and postpaid traffic files to ensure revenue assurance, rate accuracy, and regulatory compliance.

Bachelor's Degree in Electrical & Electronics Engineering – CEFET-RJ

Master's Degree Studies in Computer Science (Data Mining) – Universidade Federal Fluminense (UFF)

Specialization in Big Data (Data Analytics) – University of California San Diego (UCSD)