Every engine streams telemetry into an MSSQL database from 2009. Analysts run reports overnight and pray.
We replaced an aerospace OEM's brittle monolith with a cloud-native lakehouse serving engineers and their airline customers from the same Redshift layer.
We started with the migration plan: two phases, eleven applications, zero downtime tolerance. The bulk of the work wasn't the compute — it was the data, the IAM boundary between two business units, and the CI the on-call team would inherit.
Sixteen weeks after kickoff the last colo rack was powered down. Their analysts kept their Power BI dashboards. Their engineers got a real-time feed for the first time. Reports that used to run overnight now finish before the coffee is cold.