Available for Remote & On-site Roles

Joseph Chinonso
Bethel

Data Analyst  ·  SQL  ·  Power BI  ·  Excel

I'm a Data Analyst based in Lagos, Nigeria, with a background in Economics from the Federal University of Oye Ekiti. I work with SQL, Power BI, and Excel to analyse complex datasets, build interactive dashboards, and translate data into clear, actionable business insights across banking, fraud detection, healthcare, retail, and sales.

My approach is always business-first — I don't just build dashboards, I ask what decisions the data needs to support and work toward that. I'm open to Data Analyst, Business Analyst, and BI Analyst roles — remote or on-site — across any industry.

Banking & Fintech Fraud Detection Healthcare Retail & Sales Business Intelligence
View My Work Get In Touch
4+ Projects Completed
3+ Tools Mastered
100K+ Records Analysed
4 Industries Covered
Joseph Chinonso Bethel

Portfolio

Featured Projects

End-to-end analytics projects across banking, fraud detection, healthcare, and retail — each built with real data and delivered as interactive dashboards with business recommendations.

Banking Dashboard
Banking & Fintech

Banking Customer Behavior & Credit Risk Analysis

Analyzed customer banking data across accounts, loans, and transactions to evaluate credit risk distribution, financial exposure, and customer behavior patterns across a 50,000-customer portfolio.

SQL ServerPower BI DAXPower Query
27,296 high-risk customers identified — flagged as the largest credit segment with elevated default exposure
Customers with loan amounts exceeding account balances flagged for repayment vulnerability monitoring
Geographic credit risk concentration mapped across cities to support targeted regional lending strategies
Interactive dashboard tracking KPIs, risk distribution, and exposure across $4.5B in total loans
View on GitHub →
Fraud Overview Dashboard Customer Fraud Analysis Dashboard
Fraud Analytics

Fraud Detection & Risk Analysis

End-to-end fraud analytics across 1.9M transactions — examining fraud patterns, customer risk, financial losses, and demographic trends across two interactive dashboard pages.

SQL ServerPower BI DAXPower Query
$5.1M total fraud loss identified across 9,651 fraudulent transactions
Fraudulent transactions averaged $531 vs $68 legitimate — nearly 8× higher
Ages 51–65 identified as highest-risk demographic group for fraud exposure
Shopping category flagged as highest-loss channel — targeted fraud controls recommended
View on GitHub →
Hospital Readmission Dashboard
Healthcare Analytics

Hospital 30-Day Readmission Analysis

Analyzed 101,766 patient encounters to identify key drivers of 30-day hospital readmissions and deliver actionable clinical recommendations supporting quality improvement decisions.

Power BIDAXPower Query
Overall readmission rate identified at 11.16% across 101,766 patient records
Prior inpatient history strongest predictor — high-frequency patients at 39.8% vs 8.4% first-time
Diabetes patients carried highest readmission rate at 13% — targeted interventions recommended
Feature engineering converted raw ICD codes into readable medical condition groups
View on GitHub →
Adidas Sales Dashboard
Retail & Sales Analytics

Adidas US Sales Performance Analysis

Analyzed multi-year Adidas US sales data to evaluate product performance, regional profitability, retailer contribution, and sales channel effectiveness across the business.

ExcelPivot TablesData Visualization
$899.9M total sales tracked across 5 KPIs including 37% profit margin
West region led at $269.9M — 27% of total profit across all regions
Online channel (28%) identified as highest-growth opportunity despite lowest current share
West Gear ($243M) and Foot Locker ($220M) led across 6 evaluated retailer partners
View on GitHub →

Capabilities

Technical Skills

Core tools and analytical capabilities applied across every project.

SQL Server
SQL — SQL Server
JoinsAggregations CTEsSubqueries CASE StatementsQuery Optimisation Data Extraction
Power BI
Microsoft Power BI
DAXPower Query Data ModellingKPI Dashboards SlicersCross-filtering Interactive Visuals
Excel
Microsoft Excel
Pivot TablesVLOOKUP/XLOOKUP Conditional FormattingDashboard Creation Data CleaningReporting
Analytics
Data Analytics
Credit Risk AnalysisFraud Detection Healthcare AnalyticsSales Analytics Customer SegmentationKPI Reporting Business IntelligenceData Storytelling

Credentials

Certifications

Click any certificate to view the full credential.

SQL Certificate
Corporate Finance Institute
SQL Fundamentals for Data Analysts
March 2026
View Certificate →
Verified
Google Certificate
Google
Process Data from Dirty to Clean
February 2026
View Certificate →
Verified
IBM Certificate
IBM
Data Visualization & Dashboards with Excel and Cognos
January 2026
View Certificate →
Verified
IBM Excel Certificate
IBM
Excel Basics for Data Analysis
November 2025
View Certificate →
Verified
IBM Intro Certificate
IBM
Introduction to Data Analytics
October 2025
View Certificate →
Verified
Techlytics Certificate
Techlytics Academy
Data Analytics with Microsoft Excel
2025
View Certificate →
Verified
NYSC Certificate
National Youth Service Corps
Certificate of National Service
June 2026
View Certificate →
Completed
📊
Corporate Finance Institute
Power BI Fundamentals
In Progress
In Progress

Contact

Let's Work Together

Open to Data Analyst, Business Analyst, and BI Analyst roles — remote or on-site, across any industry. Based in Lagos, Nigeria.

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Betheljoseph6@gmail.com