Martha Oga Add Photo
Open to Opportunities

Hello, I'm

Oga Martha C.

Data Analyst · Power BI Developer · SQL Analyst

Detail-oriented Data Analyst with a strong foundation in data cleaning, exploratory data analysis, and data visualization using Excel, SQL, Tableau, and Power BI. Skilled in transforming raw datasets into actionable insights that support data-driven business decisions.

10+Projects Completed
2Certifications Earned
4Tools

Turning Data Into Decisions

I'm a certified Data Analyst with a passion for uncovering the story hidden inside every dataset. My journey into data analysis was sparked by an enduring curiosity about how businesses truly function-specifically the complex world of large-scale retail.

I found myself asking fundamental questions: How do these organizations determine which products will resonate with their customers? How do they accurately predict demand before stocking their shelves? Beyond just the volume of sales, how do they distinguish between moving inventory and generating real, sustainable profit?.

To answer these questions, I immersed myself in the world of data analytics, learning to clean, analyze, and visualize data to extract actionable insights. I discovered that the key to effective decision-making lies in understanding the underlying patterns and trends that drive business performance.

Also, this desire to peek behind the curtain and understand the mechanics of business decision-making is what led me to data analysis. I don't just want to see the numbers; I want to understand the story they tell and use those insights to help businesses thrive.

I hold a certification from TechVerve ICT Academy - One of the leading institutions in data science education and technology education and Great Learning Academy. I have applied those skills to real-world projects spanning sales analysis, HR reporting, financial forecasting, and customer behaviour analytics.

My goal is to join a data-driven team where I can contribute immediately while continuing to grow — particularly in predictive analytics and machine learning applications.

📊
Data-First Mindset Every recommendation is backed by evidence
🎯
Business-Oriented Insights connected to real business outcomes
📐
Detail-Obsessed Clean data, clean code, clean dashboards
2026

Microsoft Excel Certification

Techverve ICT Academy

2026

Data Analytics Certificate

Techverve ICT Academy

2026

SQL, PowerBi & Tableau

Techverve ICT Academy

2025

Microsoft Excel Crash Course

Great Learning Academy

Skills & Expertise

Technical Tools

X

Microsoft Excel

PivotTables, Power Query, complex formulas, VLOOKUP/XLOOKUP, data modelling, Charts, Data Cleaning

Advanced
SQL

SQL

SELECT, JOIN, GROUP BY, Filtering, Data Extraction

Advanced
PBI

Power BI

DAX, Dashboard Creation, data modelling, interactive dashboards, Power Query, report design

Advanced
TAB

Tableau

Calculated fields, LOD expressions, story points, Tableau Public, Interactive Dashboards, Data Visualization

Intermediate

Analytics Competencies

🧹📈
Data Cleaning and Visualisation Removing duplicates, handling nulls, standardising formats
Charts, graphs, and visual storytelling
🖥️
Dashboard Development, Creation and Reporting End-to-end interactive reporting solutions
Automated reports, executive summaries, ad-hoc analysis
💡
Business Intelligence KPI definition, metric tracking, trend analysis
💼
Risk Pattern Identification/AML and Fraud Awareness (Basic) Basic understanding of identifying unusual transaction patterns, analyzing customer behavior, and recognizing potential fraud or AML risk indicators through data analysis techniques.
🔗
ETL Processes Extract, transform, and load pipelines
📐
Statistical Analysis and Database Management Descriptive and inferential statistics, Schema design, indexing, query optimisation

Featured Projects

Real-world data problems, end-to-end solutions.

SQL

SQL Data Analysis Project

•Queried relational databases to extract meaningful business information.
• Used SQL operations including SELECT, JOIN, filtering, and GROUP BY.
• Analyzed structured datasets to identify trends and relationships

SQL ServerDAX
Excel PowerBi SQL

AML Transaction Monitoring Analysis

• Analyzed over 1,000 financial transactions to identify suspicious transaction patterns.
• Applied analytical techniques to detect unusual customer behaviors and risk indicators.
• Performed customer risk segmentation based on transaction activity.
• Identified high-risk transaction periods and fraud-prone activities.
• Generated insights and recommendations for improving transaction monitoring processes. .

ExcelData Analysis TechniquesSQLPowerBi
Excel

Customer Data Analysis Project

• Cleaned and organized customer datasets for accurate analysis.
• Analyzed customer purchasing behavior and revenue drivers.
• Created reports and visual summaries to support business decisions

ExcelPivotTables
Tableau

Superstore Sales Analysis Dashboard

• Analyzed retail sales data to identify revenue trends, product performance, and regional sales patterns.
• Designed an interactive Tableau dashboard to visualize sales and profit metrics.
• Extracted business insights to support profitability improvement strategies.
• Presented findings through clear data storytelling and visualization .

TableauLOD Expressions
Power BI Excel

Supply Chain Operations BI

Multi-page Power BI report monitoring inventory turnover, supplier performance, and logistics costs for a manufacturing client with 500+ SKUs.

Power BIExcelDAXPower Query

Interactive Power BI Dashboards

Fully interactive reports — filter, drill down, and explore the data yourself.

Power BI

Sales Operations Command Centre

A comprehensive sales intelligence dashboard tracking pipeline health, win rates, revenue by segment, and team performance. Features 8 pages of interactive analysis with cross-filtering enabled. Connect your own data via the parameters panel.

  • 📊 Revenue by region, product, and rep
  • 🔄 Monthly and quarterly trend comparison
  • 🎯 Target vs. actual with variance alerts
  • 👥 Team performance league table
Open Full Dashboard →

Interactive Tableau Dashboards

Published on Tableau Public — explore and interact directly in your browser.

Tableau

Global Market Intelligence Map

An interactive geographic dashboard exploring market performance across 50+ countries. Built with Tableau Public using Mapbox integration, LOD expressions for regional aggregation, and animated time-series playback.

  • 🗺️ Choropleth map with drill-down by country
  • 📅 Animated year-over-year playback
  • 🔍 Dynamic tooltips with KPI cards
  • 📱 Mobile-optimised layout
Open on Tableau Public →

Resume & CV

Ready to bring data clarity to your team?

Download my full CV to see my experience, skills, and certifications in detail. Formatted for ATS compatibility and easy reading.

Last updated: June 2026

What People Say

"

Martha consistently went beyond the brief. The sales dashboard she built wasn't just technically excellent — it changed how our leadership team runs weekly reviews. That's rare from someone just starting out.

SS
Stephen Somtochukwu CEO — BSC ICT Solutions
★★★★★
"

One of the most diligent students in our Data Analysis Class . Martha asked the right questions, submitted projects early, and helped other her co-students debug their DAX formulas. A natural analyst and communicator.

MH
Mr. Harrison Senior Instructor — Techverve
★★★★★
"

Martha delivered our churn analysis two weeks early with a bonus recommendation deck we didn't even ask for. The Python model they built saved us real money. I'd hire them full-time without hesitation.

FO
Fatima Okonkwo Head of Growth — StartupBase Africa
★★★★★

Let's Work Together

Available for full-time roles, freelance projects, and remote jobs.

Connect With Me

Whether you have a role in mind, a data problem to solve, or just want to talk analytics — my inbox is open.

Currently available for new opportunities — response within 24 hours.
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