A least privilege onboarding process is the fastest way to cut attack surfaces and prevent accidents before they happen. It means granting only the minimum permissions a new user needs to perform their role. Nothing more. Nothing "just in case." Access expands only after clear business or operational justification.
Start by mapping every permission in your systems. Identify which roles require which resources. Define onboarding workflows that assign the lowest possible set of privileges for each role. This is not a one-time setup. Review and update these role definitions as your architecture and team change.
Automate user provisioning through identity and access management (IAM) tools. Use role-based access control (RBAC) or attribute-based access control (ABAC) to enforce least privilege from day one. Every new account should be created with predefined, tightly scoped access. Always log onboarding actions for audit purposes.