Landing zone and account structure
Multi-account design with organizational units, guardrails, and centralized logging established before workloads arrive. Account boundaries are the strongest isolation AWS offers, and they are also what determines assessment scope, so drawing them well pays back in both directions.
Identity and permissions design
IAM structured so permissions are grantable without being over-broad: role design, permission boundaries, federation with your existing directory, and removal of the long-lived access keys most estates accumulate. Over-permissioned roles are the most common serious finding in an AWS environment.
Network architecture
VPC design, segmentation, private connectivity, and egress control. The default posture is more open than most regulated environments can justify, and retrofitting segmentation once workloads depend on the flat layout is materially harder than designing it in.
GovCloud and regulated workloads
Assessment of whether AWS GovCloud is required for what you handle, and design of the environment if it is. Like GCC High on the Microsoft side, it differs from commercial regions in ways that affect cost, available services, and how you operate, and those differences are worth understanding before committing.
See also: Microsoft 365
Migration planning and execution
Moving workloads in stages with rollback positions rather than a single cutover, including the decisions about what should be rehosted, what should be rebuilt, and what should be retired rather than moved at all.
Security baselines and evidence
Configuration baselines mapped to the control requirements that apply to you, with logging and monitoring producing the evidence an assessor will ask to see rather than generic best-practice settings.
See also: Compliance Readiness