Hydroficient logoCurrently an Extern @Hydroficient·🟢 Open to work
Chizuruoke Onyedim portrait

Data Scientist

I’m a Computer Science and Economics graduate passionate about using data to solve real-world problems. My work spans data analytics, machine learning, predictive modeling, and business strategy.

Work samples

Explore my work in data analytics and cybersecurity, from building models that uncover patterns in healthcare, forecasting business performance, to focusing on IoT defense strategies.

  • Hydroficient IoT Cyber Defense Externship
    Hydroficient IoT Cyber Defense Externship
    Hydroficient logo

    Hydroficient · Jul 2026 · ✅ Verified by Extern

    Hydroficient IoT Cyber Defense Externship

    Build, hack, and defend real IoT infrastructure, then hand your security playbook to an actual company. You’ll launch realistic cyberattacks, from spoofing and replay attacks to unauthorized shutoffs, and implement defenses like TLS and mTLS.

    Python ProgrammingData AnalysisThreat ModelingDashboard Development
  • Machine Learning Research Project: Exploring Temporal, Regional and Demographic Variations in U.S. COVID-19 Vaccination Uptake
    Machine Learning Research Project: Exploring Temporal, Regional and Demographic Variations in U.S. COVID-19 Vaccination Uptake
    Machine Learning Research Project: Exploring Temporal, Regional and Demographic Variations in U.S. COVID-19 Vaccination Uptake

    This project applies advanced machine learning methods to understand the drivers of COVID-19 vaccination uptake using a large, nationally representative dataset. The study emphasizes both predictive accuracy and interpretability, contributing to public-health decision-making and academic research.

    Machine LearningNeural NetworkData CleaningresearchRRandom ForestExcelCritical ThinkingCross-functional LeadershipData ScienceModeling

About me

I’m a Computer Science and Economics graduate passionate about using data to solve real-world problems. My work spans data analytics, machine learning, predictive modeling, and business strategy.

I majored in Computer Science and Economics, with a focus on Data Analytics. I thrive on tackling complex challenges in technology and security, particularly in the realm of IoT infrastructure. A unique ability to connect technical analysis to business and marketing strategy

Externships

Hydroficient IoT Cyber Defense Externship

Hydroficient

Experience

Front Desk Coordinator

Delc Medical Center · Aug 2022 - Aug 2025

Education

Austin College

BS.c Computer Science and B.A Economics · Class of 2026

Skills

Data AnalyticsCybersecurityIoT InfrastructureTLSmTLSClaudeDashboard DesignData AnalysisData ScienceData ScrapingData VisualizationGoogle AnalyticsGoogle ColabHTMLMosquittoPower BISQLJavaPythonR programming

✅ Verified by Extern

Hydroficient IoT Cyber Defense Externship

Build, hack, and defend real IoT infrastructure, then hand your security playbook to an actual company. You’ll launch realistic cyberattacks, from spoofing and replay attacks to unauthorized shutoffs, and implement defenses like TLS and mTLS.

Python ProgrammingData AnalysisThreat ModelingDashboard Development

Overview

The work recreated a smart traffic-light and water-sensor IoT environment, mapped assets with confidentiality, integrity, and availability ratings, and performed a STRIDE analysis per component. It produced a Python sensor-log generator, an intercepted MQTT trace from an unsecured pipeline, TLS experiment metrics, a Device Provisioning Policy for mTLS, replay-attack test results, and a real-time

Hydroficient IoT Cyber Defense Externship

What I've accomplished

I delivered a prioritized STRIDE threat model, exported structured sensor logs from a Python generator, an intercepted MQTT message trace, measured TLS metrics (latency and throughput), a Device Provisioning Policy for mTLS, a replay-defense report, and a dashboard-backed experiment showing all tested attacks blocked.

Project breakdown

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Machine Learning Research Project: Exploring Temporal, Regional and Demographic Variations in U.S. COVID-19 Vaccination Uptake

This project applies advanced machine learning methods to understand the drivers of COVID-19 vaccination uptake using a large, nationally representative dataset. The study emphasizes both predictive accuracy and interpretability, contributing to public-health decision-making and academic research.

Machine LearningNeural NetworkData CleaningresearchRRandom ForestExcelCritical ThinkingCross-functional LeadershipData ScienceModeling

Overview

This project applies advanced machine learning methods to understand the drivers of COVID-19 vaccination uptake using a large, nationally representative dataset. The study emphasizes both predictive accuracy and interpretability, contributing to public-health decision-making and academic research.

Machine Learning Research Project: Exploring Temporal, Regional and Demographic Variations in U.S. COVID-19 Vaccination Uptake

What I've accomplished

Built and evaluated nine classification models, including Random Forest, XGBoost, SVM, LASSO, and logistic regression, using train/test splits and 10-fold cross-validation. Compared accuracy, precision, recall, F1 and AUC, then used SHAP to interpret predictions and analyze subgroup differences.

Outcome

Random Forest was the strongest model, achieving a 0.944 AUC versus 0.812 for logistic regression. SHAP analysis identified prior routine vaccination, education, and income-to-poverty ratio as the most consistent predictors, while revealing meaningful differences across regions and demographic groups.

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Back to works

Retail Sales Forecasting Model

Built a predictive sales model to determine which of five potential Pizza Planet locations offered the strongest expansion opportunity. Analyzed demographic, geographic, competitive, and site-level factors to identify key sales drivers and translate quantitative findings into actionable real estate

Workforce Data Analysisbusiness analytics

Overview

Built a predictive sales model to determine which of five potential Pizza Planet locations offered the strongest expansion opportunity. Analyzed demographic, geographic, competitive, and site-level factors to identify key sales drivers and translate quantitative findings into actionable real estate recommendations.

Retail Sales Forecasting Model

What I've accomplished

Cleaned and prepared location data, selected features using correlation analysis and economic intuition, and tested for multicollinearity using VIF. Built and compared linear, nonlinear/interaction, and LASSO regression models, then evaluated performance on holdout data using R², RMSE, and MAE.

Outcome

The final model achieved a 0.563 R² on holdout data and was used to forecast sales across five proposed locations. Store 9002 ranked highest with approximately $1.67M in predicted sales, followed by Store 9001 at $1.49M, providing a data-backed recommendation for expansion.

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