Optum · System Migration

Enterprise EHR Data Migration

Business Systems Analyst, 2017–2024

Coordinated a cross-functional team of 30 through a complex application and data migration, mapping data crosswalks between legacy EHR software and new enterprise systems to protect data integrity.

Zero-loss data crosswalk across 30-person delivery team

The Problem

Clinical and operational data needed to move from a legacy EHR system to a new enterprise platform. The two systems didn't share a data model, and clinical staff depended on that data being complete and correct the moment the new system went live — there was no tolerance for silent data loss.

The Approach

Performed a deep-dive operational analysis of the legacy EHR to understand not just what data existed, but how clinical staff actually used it day to day, then built field-by-field crosswalks between the legacy and new schemas before any migration work began.

What I Built

Mapped detailed data crosswalks between legacy EHR fields and the new enterprise system's data model.
Coordinated a cross-functional team of 30 — clinical stakeholders, technical teams, and vendor contacts — through the migration.
Defined validation checkpoints to catch discrepancies before they reached production.
Sequenced the cutover to minimize disruption to active clinical workflows.

The Impact

Migrated the full dataset with no loss of clinical or operational data.

Kept a 30-person delivery team aligned across clinical, technical, and vendor stakeholders.

Delivered a migration playbook that shaped how later system transitions were planned.

Tools

EHR/EMRData MappingCross-Functional Leadership

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