BEST OHAH

Data Analyst | Business Intelligence Analyst

GitHub

About

Highly analytical Data Analyst and Analytics Instructor with a proven track record of transforming complex data into actionable insights across health tech, logistics, and edtech sectors. Expert in SQL, Python, Power BI, Excel, and Tableau, leveraging advanced analytical methods like A/B testing and funnel optimization to drive strategic decision-making. Adept at building scalable data infrastructure, developing impactful dashboards, defining KPIs, and mentoring aspiring analysts, ensuring high-impact data solutions and fostering data literacy.

Work Experience

Strategic Data & Insights Lead

Ruto AI

May 2025 - Present

Nigeria, Nigeria, NG

Led data infrastructure development and strategic insights generation for RutoAI, driving performance tracking and informed decision-making.

  • Defined and led development of RutoAI's data infrastructure, establishing key performance indicators (KPIs) including vendor lifetime value, escrow velocity, and dispute resolution rates to enhance performance tracking.
  • Constructed foundational dashboards with SQL and Power BI, enabling real-time monitoring of vendor segmentation, conversion funnels, escrow lifecycle, and product usage metrics.
  • Analyzed vendor acquisition and retention patterns to identify high-value behaviors and critical friction points, optimizing onboarding and platform engagement strategies.
  • Partnered with product and engineering teams to structure internal datasets, facilitating fraud detection, pricing calibration, and AI integration workflows.
  • Contributed to internal data strategy by designing core business process documentation and initial metrics frameworks, surfacing key insights for product development and fundraising decisions.

Lead Instructor: Data Analytics

Correlation One

Apr 2025 - Present

New York, NY, United States

Delivered hands-on data analytics training and developed curriculum for global cohorts at Correlation One, enhancing learner skills and engagement.

  • Delivered live, hands-on training sessions on data analysis, including Microsoft Excel, SQL, Power BI, and Tableau, to global cohorts.
  • Designed and refined data analytics curriculum modules in collaboration with instructional design team, ensuring alignment with industry standards and learner needs.
  • Mentored and provided academic support to learners, offering real-time guidance and project-based learning support.
  • Analyzed learner engagement data to suggest and implement enhancements, improving course delivery and scheduling.

Data Analyst

EHealth4Everyone

Feb 2025 - Jun 2025

Nigeria, Nigeria, NG

Developed an interactive Tableau dashboard for EHealth4Everyone, enabling data-informed healthcare planning.

  • Developed an interactive Tableau dashboard visualizing over 40,000+ health facility records across Nigeria, enabling data-informed healthcare planning decisions for stakeholders.
  • Validated large volumes of health-related data using Excel, ensuring integrity, consistency, and readiness for integration into centralized databases.
  • Conducted structured data entry from field surveys, supporting timely and accurate reporting for government and donor-funded health programs.
  • Collaborated with internal teams to maintain data accuracy, resolve discrepancies, and enhance data quality protocols for health analytics.

Data Analyst & Instructor

Axia Hub

Apr 2022 - Aug 2024

Nigeria, Nigeria, NG

Delivered comprehensive data analysis and training for a transport and logistics company at Axia Hub, supporting strategic expansion and student readiness.

  • Delivered comprehensive analysis for a transport and logistics company, evaluating year-on-year business growth, user retention, and revenue trends to directly support strategic expansion decisions.
  • Conducted A/B testing initiatives with product and marketing teams, generating insights that improved campaign effectiveness and user engagement.
  • Facilitated in-person and virtual training for aspiring data analysts in SQL, Power BI, Excel, and Python, incorporating real-world projects and hands-on exercises.
  • Designed data-driven lesson plans, course modules, and assessments, contributing to a 20% increase in student course completion rates and enhancing job readiness.

Head of Academy

Axia Hub

Feb 2024 - Jul 2024

Nigeria, Nigeria, NG

Oversaw academy operations and training delivery at Axia Hub, enhancing program execution and participant satisfaction.

  • Oversaw academy operations, including recruitment, training delivery, and instructor support, ensuring seamless program execution across software development, data analysis, graphics design, and digital marketing.
  • Coordinated staff scheduling, learning resources, and internal systems, enhancing training quality and participant satisfaction.
  • Introduced operational improvements, reducing training overhead by 15% while simultaneously improving learner feedback scores.
  • Collaborated with leadership to align training strategies with industry demand, contributing to a 25% increase in academy enrollment within 6 months.

Education

Geology

University of Nigeria

Nigeria, Nigeria, NG

Data Engineering

AltSchool Africa

Jun 2025 - Jul 2026

Nigeria, Nigeria, NG

Data Analytics

Turing College

May 2024 - Nov 2024

Nigeria, Nigeria, NG

Projects

Subscriber Retention Analysis

Conducted SQL-based analysis of customer data to identify trends, supporting retention strategies transferable to evaluating biotech investment portfolios.

Promotional A/B Test

Executed an A/B test for a fast-food chain to determine which of three marketing promotions led to the highest sales boost, showcasing analytical rigor for investment decision support.

Customer Segmentation

Used SQL and Power BI to segment a large customer base into distinct personas. This analysis formed the foundation for developing targeted brand messaging and content strategies to increase engagement.

Skills

Tools

  • SQL (BigQuery, PostgreSQL, Microsoft SQL Server)
  • Microsoft Excel
  • Python (Pandas, NumPy, Matplotlib, Seaborn)
  • Power BI
  • Tableau
  • Google Sheets
  • Looker Studio
  • HubSpot CRM
  • Git
  • GA4

Analytical Techniques

  • A/B Testing
  • Cohort Analysis
  • Retention & Churn Analysis
  • Funnel Analysis
  • Customer Lifetime Value (CLV)
  • Customer Acquisition Cost (CAC)
  • Product Usage Analytics

Workflow Automation

  • ETL/ELT Processes
  • Data Cleaning & Preparation
  • Dashboard Templating
  • Reporting Pipeline Automation
  • Data Quality Checks