Worked on the Open-Earth-Foundation/CityCatalyst repository to deliver data integration and targeted corrections supporting emission modeling. Developed a feature to integrate degree_of_utilization data from the IPCC 2006 EFDB, adding raw and CSV-formatted population fractions and treatment methods across multiple regions and countries. Applied data engineering and CSV manipulation skills to refine FormulaInputs.csv, updating CH4 and CO2 parameters and enhancing country and income-group specificity for wastewater emissions modeling. Emphasized data quality and reproducibility by using explicit commit messages and chunked updates, ensuring traceability. The work improved input accuracy for policy analysis and enabled scalable, regionally comparable scenario analyses.