Renato Oshiro

High-impact Business Intelligence & Analytics Specialist with over 10 years of progressive telecommunications experience, specializing in reference data governance, subscriber reporting, and financial/billing data validation. Expert at bridging cross-functional teams to align Go-To-Market (GTM) product builds with carrier-grade data warehouses. Master of Science in Data Analytics with hands-on expertise in Databricks, SQL, and relational databases, with a proven track record of managing reference table integrity for platforms processing 1B+ daily transactions.

Skilled in resolving complex subscriber data anomalies, driving continuous process improvement, and translating technical data structures into clear executive insights.

Housekeeper at Westhill Long Term Care Residences (2025 – Present)

• Create daily plans to coordinate staff to carry out cleaning tasks
• Execute cleaning regimen according to intake schedule of new residents and audits
• Ensure high standards of sanitation, safety, and Ontario Ministry of Health compliance across a 32-room resident floor, dining facilities, and common areas
• Manage cleaning product inventory and coordinate with staff on ordering processes
• Restock critical hygiene products (soap, sanitizers, paper supplies) to maintain health standards and operational efficiency
• Engage with residents daily to promote mental health\well-being, providing additional care and support as needed

Billing, Charging, & Reporting Systems Tech Lead at Telefonica Brasil (2020 – 2024)

• CAB Governance & System Risk Audits: Presented, justified, and defended core billing engine updates, rating logic changes, and system patch Change Requests (CRs) before the Change Advisory Board (CAB), securing multi-stakeholder approval (Finance, Engineering, Security) to eliminate operational risk prior to deployment
• Incident Management: Managed major incidents across high-throughput systems, utilizing PowerBI analytics and SRE disciplines to identify recurrent failure patterns, reduce MTTR (Mean Time to Resolution), and improve overall system availability
• Billing Reporting Systems Ownership: Managed and governed the end-to-end data pipelines for Telefonica’s proprietary prepaid reporting systems alongside a centralized Tableau-based reporting and dashboard platform for the new Core PS postpaid billing system
• Data Governance & Reference Integrity: Held end-to-end accountability for reference data governance and pipeline validation across high-volume subscriber billing and ordering systems, ensuring 99.9% reporting accuracy for over 1 Billion daily transaction records
• Go-To-Market (GTM) & Pricing Alignment: Partnered with cross-functional "Smart Offers" and GTM squads to review all new wireless product builds and promotional pricing constructs; mapped data schemas in core reference tables to secure reporting integrity
• Subscriber Anomaly Investigations: Spearheaded ad-hoc subscriber reporting projects and deep-dive root-cause investigations into reporting anomalies; applied Lean Six Sigma frameworks to reduce monthly data integrity issues by 92%
• Technical Mentorship & Best Practices: Mentored senior database and reporting analysts on advanced data architectures, establishing standardized BI best practices, performance metrics, and technical development frameworks
• Executive & Financial Insights: Prepared and delivered concise performance reports, data validation audits, and interactive dashboards to directors and VP-level stakeholders to support quarterly business reviews
• Continuous Improvement: Programmed automated validation scripts across core database reference tables, shortening release timelines by 20% while elevating data warehouse reporting quality

Telecommunications & Infrastructure Consultant at Telefonica Brasil (2012 – 2020)

• System Audits & Technical Leadership: cross-functional engineering and database pods to manage complex migrations of legacy billing and provisioning configurations into next-generation Linux systems
• Vendor & Stakeholder Management: Coordinated with multi-regional vendors to influence product roadmaps, manage hardware/software delivery, and ensure alignment with corporate operational KPIs
• Subscriber Data Management: Supported and audited critical, high-availability subscriber tracking and profile databases – HLR/HSS/UDC, ensuring seamless network entry, authentication, and downstream billing accuracy
• 24x7 Escalation & Problem Solving: Acted as a Tier-3 escalation point for high-priority service outages, using advanced analytics and multi-protocol troubleshooting to reduce customer impact and system downtime

Master’s of Science (MSc) in Data Analytics – University of Niagara Falls, Canada (2026)

Graduate Specialization in Telecommunications Engineering & Management – Inatel, Brazil | FECAP, Brazil (2012)

Bachelor’s of Engineering (BEng) in Electrical – FEI, Brazil (2004)