Professional Services Firm Cuts Infrastructure Costs by 43% with AWS Migration

We used the AWS Migration Acceleration Program framework to assess and categorize all 47 workloads: 31 were lift-and-shift candidates, 12 needed minor re-architecture, and 4 were retired as part of the migration (consolidating redundant systems). We ran the migration in three waves, starting with non-critical workloads and working up to production. Zero data was lost and the highest-risk production cutover window was 4 hours on a Sunday morning. Post-migration, we implemented AWS Cost Explorer and automated rightsizing — turning off dev environments evenings and weekends, moving to Reserved Instances for steady-state workloads, and using S3 Intelligent-Tiering for archival data. The infrastructure bill dropped 43% from the projected on-prem refresh cost.