John Wilson

I’m a Data Analyst with a strong foundation in SQL, R, Excel, and Tableau, and I use Python to clean, transform, and analyze data. I focus on turning messy data into clear findings that support better business decisions.

At Decode Data Academy, I performed data cleaning and preprocessing on structured datasets of 50K+ records using Python and SQL, improving data quality and reducing null/inconsistent entries by 30%. I also ran end-to-end exploratory data analysis on 300+ student records to identify trends, outliers, and performance metrics.

I built multi-page Power BI dashboards using DAX, slicers, and dynamic filters to visualize KPIs, reducing manual reporting effort by 40%. I then generated insights by identifying low-performing student segments and presented findings to stakeholders to enable data-driven decision-making.

Before that, I worked as a trainee/intern at Magnum Group on the Government e-Marketplace (GeM) platform, supporting product listings, order processing, and basic data tracking. I also interned at Bhopal District Court, managing and organizing large volumes of case-related data and extracting key information—strengthening my accuracy, detail-orientation, and structured thinking. I’m committed to continuous learning through certifications like the Google Data Analytics Professional Certificate and full-stack data analytics training.