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Monthly Data Validation Tool

Automated Data Validation

C# .NET REST API Excel Automation

The Problem

Every month, 72 global sites submitted data to a collection system that fed audited investor reports for a publicly traded company. Validating it was entirely manual — exporting reports, copying into analysis spreadsheets, cross-checking every tab, then chasing corrections under tight deadlines. It consumed two full days every cycle.

The Solution

I built a desktop application that pulls data directly from the collection system's API, runs every validation automatically through a simple menu, writes flagged issues to a formatted Excel report, and can email corrections to sites in one click — eliminating the manual export-copy-check loop entirely.

The Impact

Monthly validation dropped from two days to minutes. The process can now be repeated as often as needed without added effort, and the structured output removed the risk of human error in a compliance-critical workflow.