Using multiple AWS accounts is a best practice that can help you isolate and manage business applications and data. If you have looked at the AWS Well-Architected Framework you might have seen that having multiple accounts for an organisation can help achieve operational excellence, security, reliability, and even cost optimisation. Starting with a good multi-account foundation is something that will enforce many best practices from day 0, like, for example, not having long-lived credentials on developers’ machines. And the benefits just get greater as the company grows and the level of cloud adoption increases. It’s a practice that scales well from 1 developer to thousands of developers! In this talk, I will show you how to leverage services such as AWS IAM Identity Center, AWS Organizations, and tools such as Granted and OrgFormation to manage multiple accounts confidently and consistently.