I turn raw, messy data into clear stories that drive real business decisions. From writing complex SQL queries to building interactive Power BI dashboards — I help organisations see what the data is actually saying.
Year of ExperienceData Analyst at Othello Institute of Technology
11+
Projects CompletedFrom Excel automation to Power BI dashboards
3
CertificationsGoogle · Microsoft · SQL
Who I Am
About Me
I'm a Data Analyst based in Lagos, Nigeria, with hands-on professional experience turning complex, messy data into clear stories that drive real business decisions.
My work spans the full analytics lifecycle — collecting and cleaning raw datasets, writing optimised SQL queries, building DAX-powered Power BI dashboards, and presenting findings to stakeholders in a way that's easy to understand and act on.
I've worked across customer retention analysis, sales performance tracking, market research, HR data management, and automated reporting — always focused on delivering insights that actually matter to the business.
I'm detail-oriented, collaborative, and passionate about using data as a tool for better decision-making. Currently open to full-time, contract, and remote roles.
🏢
Othello Institute of TechnologyData Analyst · March 2025 – February 2026
🎓
BSc EntrepreneurshipKwara State University · Nov 2024
📍
Lagos, NigeriaOpen to remote & hybrid roles
📧
omotolaniayinke863@gmail.com
🌐
LanguagesEnglish (Fluent) · Yoruba (Fluent)
Featured Case Study
How I Identified 3 Key Churn Drivers to Improve Customer Retention
Step 01
Problem
Business was losing customers with no clear understanding of why. Needed to identify patterns in churned vs. retained customers.
Step 02
Approach
Cleaned and queried customer data using SQL. Segmented customers by behaviour, demographics, and transaction history.
Step 03
Analysis
Built a Power BI dashboard with DAX measures tracking churn rate, customer lifetime value, and segment-level KPIs.
Step 04
Result
Pinpointed 3 root causes of churn. Delivered recommendations adopted by the retention team for strategic action.
Built interactive Power BI dashboards using DAX. Wrote and optimised complex SQL queries. Developed and maintained structured databases. Cleaned and transformed large datasets. Collaborated with stakeholders to deliver clear, visual data stories supporting strategic decisions.
Graduated November 2024
BSc Entrepreneurship
Kwara State University · Nigeria
Studied business strategy, market analysis, and entrepreneurial thinking — skills that directly inform how I approach data problems with a business-first mindset.
2024 – 2025
Professional Certifications
Google · Microsoft · SQL
Completed Google Data Analytics Professional Certificate, Microsoft Excel & Power BI Fundamentals, and SQL for Data Analysis.
What I Use
Technical Skills
Data Analysis & Querying
SQLMySQLExcelGoogle Sheets
Data Visualization
Power BIDAXTableauExcel Charts
Spreadsheets & Reporting
Power QueryPivot TablesExcel AutomationVLOOKUP
Excel Functions
IF / SUMIFSUMIFSAVERAGEIFSCOUNTIFSLEFT / RIGHT / MIDTRIM / PROPER
Programming
Python (Pandas)HTMLCSS
Core Competencies
Data CleaningKPI TrackingDashboard DesignData StorytellingDatabase Design
Proficiency Levels
Tools & Software
📊Power BI
🗄️SQL / MySQL
📗Microsoft Excel
📈Tableau
🔷DAX
🔄Power Query
📋Google Sheets
🐍Python (Pandas)
🏢Microsoft Office
🌐HTML / CSS
My Work
Projects
⏳ Loading projects...
Credentials
Certifications
🎓
Google Data Analytics Professional Certificate
Google · Coursera
📊
Microsoft Excel & Power BI Fundamentals
Microsoft
🗄️
SQL for Data Analysis
Verified Certification
What Others Say
Testimonials
Omotolani consistently delivered clean, well-structured dashboards that made it easy for our team to understand performance at a glance. Her attention to detail and ability to translate data into business language is impressive.
OI
Supervisor
Othello Institute of Technology
Her work on our data cleaning and reporting processes saved the team significant time every week. She approaches every dataset with structure and a clear focus on what the business actually needs.
TL
Team Lead
Othello Institute of Technology
What stands out about Omotolani is her ability to ask the right questions before diving into the data. She doesn't just produce numbers — she tells you what they mean and what to do next.
CA
Colleague
Data Analytics Cohort
Thoughts & Insights
Data Insights Blog
📊
Excel · Analysis
5 Things I Learned From Analysing Coca-Cola Sales Data
Sales data tells more than just numbers — it reveals seasonality, regional gaps, and hidden opportunities.
Coming soon · Data Analysis
🔍
Power BI
How to Build a Churn Dashboard That Actually Drives Action
Most churn dashboards show what happened. The best ones show what to do next.
Coming soon · Power BI & DAX
🧹
Data Cleaning
Why Data Cleaning is 80% of the Job — And How to Do It Fast
Before any analysis, the data must be trustworthy. Here's my step-by-step Excel cleaning process.
Coming soon · Excel Tips
Get In Touch
Let's Work Together
Actively looking — available immediately
I'm open to Data Analyst and Business Analyst roles — full-time, contract, or remote. Whether you have a project, an opportunity, or just want to connect, reach out!
