AWS Services for Central Security Management Across Accounts

Quick Answer

Centrally managing security across many AWS accounts is fundamentally about layering a small set of purpose-built services that operate at the organization level rather than being configured account by account. AWS Organizations is the foundation because it lets you group accounts, apply service control policies that set permission guardrails across every account in an organizational unit, and enforce a consistent security baseline from one place rather than logging into each account individually. AWS Config complements this by extending centralized visibility into resource configuration and compliance: once Config is enabled in member accounts and aggregation authorizations are set up, an administrator account can pull configuration and compliance data from every member account into a single aggregated view, so the team can see drift or non-compliant resources across the organization without switching accounts. The reason both belong together is that they address two different layers of the same problem, Organizations governs what accounts and principals are allowed to do, while Config with aggregation governs visibility into what resources actually look like, and a complete strategy needs both. When a question asks which services support centralized, organization-wide security management, expect answers that explicitly support a management-account-to-member-account relationship, such as Organizations, Config aggregators, and Security Hub, rather than services confined to a single account's boundary.