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Ioannis Kerestetzis

@ioanniskerestetzis

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Research scientist who turns clinical data into clear statistical insights for real-world decisions.

Zimbabwe

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What I'm looking for

I’m looking for a research-focused role where I can apply statistical and clinical analysis skills to strengthen study design, produce publishable results, and communicate findings clearly to teams and stakeholders.

I’m a research scientist focused on designing and analyzing studies that produce reliable, publication-ready findings. I apply statistical methods to clinical datasets, interpret results with care, and communicate them clearly through reports, manuscripts, and presentations.

Across my work, I’ve contributed to study execution such as participant-facing processes (including screening and consent) and coordinated research activities. I’m energized by translating evidence into actionable insights, whether that’s through posters, stakeholder updates, or academic publications.

Experience

Work history, roles, and key accomplishments

Mathematics Teacher

High School

Sep 2025 - Jun 2026 (9 months)

Contract mathematics teaching role (23-hours per week) in Athens, Greece.

Data Analytics & Insights Specialist

OPAP

May 2023 - Aug 2025 (2 years 3 months)

Worked in a team with hands-on machine learning experience, creating internal reports for executive-level decision-making. Implemented and monitored an early identification algorithm for new online customers and supported analytics for CRM campaigns and business assumptions.

Data Driven Decision Support Machine Learning Reporting Stakeholder Management Automation Monitoring Early Identification Algorithms CRM Analytics Budget Assumptions Assessment

Business Intelligence Analyst

Aqurance

Apr 2021 - Apr 2023 (2 years)

Analyzed customer business needs and built automated ETL solutions. Produced data visualizations using multiple BI tools.

ETL Pentaho SQL Data Visualization Qlik Sense Spotfire Power BI

Data Linkage and Report Proofreading

Globalwebindex (GWI) & EdemRights

Oct 2020 - Mar 2021 (5 months)

Ensured accuracy of PowerPoint reports by proofreading data and editing graphs as needed. Linked and matched data lists to database entities and supported data documentation by identifying unknown issues.

PowerPoint Data Matching Data Linkage Data Reconciliation Data Documentation Data Quality Assurance Graph Editing

Data Analyst

London International Vintners Exchange (Liv-ex)

Dec 2017 - Sep 2019 (1 year 9 months)

Calculated and automated company KPIs, including financial values and targets. Built and maintained a fair-value pricing tool in R Shiny and extracted, pre-processed, analyzed, and visualized trading, financial, and logistics data.

data preprocessing KPI Calculation Financial KPI Automation R Shiny Data Extraction Data Analysis Data Visualization

Education

Degrees, certifications, and relevant coursework

School of Informatics, University of Edinburgh

Postgraduate Diploma in Data Science, Data Science

2016 - 2017

Included real-world applications and machine learning methods. Completed projects using Python and libraries such as NumPy, Pandas, and SciPy.

National Technical University of Athens

Diploma in Applied Mathematics, Applied Mathematics

2009 - 2015

Grade: 7.5/10

Studied data, probabilities, and statistics through various modules and projects. Worked on projects using R and SPSS to strengthen analytical and problem-solving skills.