Onyinyechi Nwosu
Data Analyst | Turning Data into Clear Business Insights
Data Analyst with 3+ years of experience turning complex data into clear, actionable insights using Power BI, Excel, and SQL to drive smarter business decisions.
Featured Project
A comprehensive healthcare analytics dashboard showcasing patient outcomes, operational efficiency, and data-driven decision-making.
Hospital Performance & Outcome Analytics Dashboard
Problem: Healthcare administrators needed a centralized way to monitor patient outcomes, hospital performance, and operational efficiency across departments.
The dashboard provides insights into patient outcomes, departmental performance, revenue trends, recovery rates, mortality rates, and operational efficiency using interactive visualizations and KPI tracking.
Other Projects
A collection of analytics projects showcasing SQL, Power BI, Excel, data visualization, business intelligence, customer analytics, financial risk analysis, workforce analytics, and operational performance reporting across diverse industries.
NaijaMart E-Commerce Sales & Customer Analytics (SQL)
Problem: NaijaMart needed visibility into customer purchasing behavior, revenue drivers, product performance, payment preferences, and delivery operations to support data-driven decision-making.
Using SQL, I analyzed over 10,000 e-commerce transactions across multiple customer segments, product categories, and Nigerian states to uncover revenue trends, customer behavior patterns, operational bottlenecks, and growth opportunities.
Credit Risk & Loan Default Analysis Dashboard
Problem: Financial institutions need a smarter way to monitor lending performance, identify high-risk borrowers, and reduce loan default risk while maintaining healthy approval rates.
The Credit Risk Dashboard provides insights into loan performance, borrower behavior, portfolio exposure, and default risk patterns across risk categories, employment stability, age groups, and credit score segments.
Employee Attrition & Engagement Dashboard
Problem: HR teams needed better visibility into employee attrition patterns and engagement factors affecting workforce retention.
The dashboard analyzes employee attrition trends, engagement levels, salary distribution, job satisfaction, and workforce demographics to uncover patterns affecting employee retention.
Customer Support Performance Dashboard
Problem: Organizations need visibility into customer support performance to improve response efficiency and customer satisfaction.
This dashboard analyzes response time, resolution trends, customer satisfaction scores, escalation rates, and ticket volume to support data-driven customer support decisions.
Sales Performance Analysis Dashboard
Problem: Retail businesses need clear insights into sales performance, customer behavior, and product trends to improve business growth.
The dashboard tracks revenue performance, product line analysis, customer trends, payment methods, and sales distribution across different locations and time periods.
Skills
Experience
Data Analyst — Versus Africa
- Analyzed large-scale survey and market research data across telecommunications, banking, FMCG, and consumer sectors to uncover actionable business insights.
- Designed interactive dashboards and reports using Power BI and Excel to track KPIs, customer behavior, and campaign performance.
- Performed data cleaning, transformation, and validation to improve reporting accuracy and ensure reliable analysis.
- Delivered insight-driven reports and presentations that supported strategic decision-making for clients and stakeholders.
- Managed respondent datasets and research operations across multiple projects while ensuring data quality and efficient reporting processes.
- Collaborated with research and operations teams to identify trends, measure performance, and improve project outcomes.
Customer Support & Data Analyst — Onfon Media
- Analyzed user behavior and customer support data to identify operational trends and performance gaps.
- Improved reporting processes by transforming raw data into structured business insights.
Let’s Connect
I’m currently open to Data Analyst and Business Intelligence opportunities where I can use data to support smarter business decisions and drive meaningful impact.
Email: onyinyechinwosu66@gmail.com
LinkedIn: linkedin.com/in/onyinyechi-janet-nwosu