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Chinaza favour Okonkwo

@chinazafavourokonkwo

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I build SQL, Excel, and Power BI analyses for payment reconciliation, fraud detection, and reporting.

Nigeria

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What I'm looking for

I'm looking for a data-focused role where I can apply SQL, Excel, and Power BI to accurate, repeatable reporting, reconciliation, and fraud analysis while learning additional tools such as Python or R as needed.

I've built payment operations analyses through PayFlowNG projects, using SQL, Excel, and Power BI to make transaction data accurate and actionable.

In a 30-day reconciliation analysis, I compared 10,000+ internal and bank transactions and identified all 28 deliberately introduced discrepancies with zero false negatives. I also built a CASE-based classification query and Excel dashboard that achieved a 99.86% reconciliation rate by value.

I created a Power BI payments dashboard for 10,000+ transactions, using DAX for a seven-day rolling average and interactive slicers for date range, payment type, and fraud flags. I also developed SQL-based fraud detection analysis across 60,000+ transactions, documenting sample-size limitations rather than overstating results.

Alongside my data projects, I maintain audit-ready personnel and attendance records for 70+ staff at the National Institute for Hospitality and Tourism. I'm pursuing ICAN Skills Level and continuing to build the practical analysis skills needed for data-focused roles.

Experience

Work history, roles, and key accomplishments

Current

Administrative Officer

Current

National Institute for Hospitality and Tourism

Sep 2025 - Present (1 year)

Maintain personnel records and weekly attendance tracking for 70+ staff, ensuring data accuracy and audit readiness. Coordinate a weekly knowledge-sharing programme and manage the department's document filing system.

Data Accuracy Record keeping Attendance Tracking Document Management Coordination Communication Skills

Office Administrative Assistant

Budget Office of the Federation

May 2024 - Jun 2025 (1 year 1 month)

Logged and tracked incoming/outgoing letters from ministries and agencies, handling up to 120 letters a week during budget season. Provided document tracing and budget preparation support.

Document Management Correspondence Management Expense Tracking Typing Organization

Customer Service Representative

Ajatex Digital Services

Sep 2023 - Apr 2024 (7 months)

Assisted 20-35 students daily with course registration, fee payments, and result checks. Built a reference log of recurring issues and created troubleshooting guides for the team.

Customer Service Troubleshooting Documentation Communication Skills