- What this is
- Cloud architecture, migration, and infrastructure services starting from a Microsoft Cloud Adoption Framework Enterprise-Scale landing zone. FedRAMP-aligned reference architecture for federal and regulated commercial buyers.
- Who it’s for
- Federal civilian agencies and regulated commercial buyers operating on Azure Commercial, Azure Government, GCC, or GCC High. Multi-cloud and hybrid delivery available where buyer environment dictates.
- Reference architecture
- Azure landing zone (Enterprise-Scale) · Microsoft Cloud Adoption Framework · Entra ID · Azure Policy + Defender for Cloud for continuous compliance.
- Engagement model
- Three-phase delivery — foundation → migration → optimization. Continuous compliance and cost discipline built into the operating posture from day one.
Capability Detail
Cloud & Infrastructure
Cloud architecture, migration, and infrastructure services on Azure landing zones aligned to the Microsoft Cloud Adoption Framework. Federal Risk and Authorization Management Program (FedRAMP)-aligned reference architecture for federal and regulated commercial buyers. Foundation through optimization, with continuous compliance and cost discipline built into the operating posture from day one.
Overview
Landing zones, not lift-and-shift
Most cloud programs underperform their business case because the foundation was treated as a checklist rather than a system. Without a deliberate landing zone — subscription topology, identity integration, network segmentation, policy baseline, and observability — workloads migrate into an environment that cannot scale, cannot pass audit, and cannot be operated economically. The remediation cost is substantially higher than building the foundation correctly the first time.
Cornerstone Systems Group delivers Azure cloud architecture and infrastructure services starting from a Microsoft Cloud Adoption Framework Enterprise-Scale landing zone, instrumented for the buyer's compliance posture from day one. Migration, workload onboarding, and operations transfer proceed against that foundation rather than around it. FedRAMP-aligned reference architecture is available for federal and regulated commercial buyers operating on Azure Government, GCC, or GCC High.
Reference Architecture
Azure landing zones, Cloud Adoption Framework aligned
The reference architecture deploys an Enterprise-Scale landing zone per the Microsoft Cloud Adoption Framework — management group hierarchy, subscription topology, Entra ID integration, hub-and-spoke or Virtual WAN network design, Azure Policy baseline, Defender for Cloud regulatory compliance posture, and Azure Monitor / Log Analytics observability. Infrastructure-as-code (Bicep or Terraform) is the default deployment artifact, with reusable modules surfaced for the buyer's downstream platform team.
For federal and regulated commercial buyers, the reference architecture is FedRAMP-aligned and deployable on Azure Government, GCC, or GCC High where the buyer's classification posture requires it. The architecture inherits the FedRAMP authorization of the underlying Azure cloud surface; the buyer's system Authorization to Operate (ATO) is issued against the buyer's environment, not against CSG. Multi-cloud and hybrid delivery — AWS, Google Cloud, VMware-on-cloud, or on-premises integration — proceed under the same landing-zone discipline using substrate-native primitives.
Delivery Model
Three-phase implementation
Foundation
Landing zone design and deployment per Cloud Adoption Framework Enterprise-Scale. Subscription topology, management group hierarchy, identity integration with Entra ID, baseline Azure Policy and Defender for Cloud regulatory compliance posture, network segmentation, and observability scaffolding. Migration wave plan scoped against business priority and dependency mapping.
Migration & Workload Onboarding
Workload migration executed in sequenced waves per the Phase 1 plan. Network and security integration hardened per landing zone policy. Workload-level observability, backup, and disaster recovery posture established. Cutover runbooks, rollback playbooks, and post-migration verification documented per workload.
Optimization & Operations
Cost optimization and FinOps practice activation. Continuous compliance monitoring against the framework baseline. Operations runbook, automation library, and platform-team knowledge transfer for sustainment. Ongoing architecture advisory available on a scoped engagement basis post-handover.
Engagement Patterns
Where landing-zone discipline earns its keep
Engagement patterns share a common shape: the buyer is moving workloads to Azure or operating an Azure environment that needs landing-zone discipline, the compliance posture is regulated or becoming so, and the buyer requires infrastructure-as-code deliverables and a clean handover to a sustainment team rather than dependency on consulting hours indefinitely.
- Federal civilian agency greenfield Azure landing zone. Federal civilian agency or supporting contractor requires a greenfield Azure Government or GCC landing zone deployable as infrastructure-as-code, with FedRAMP-aligned baseline policy, Entra ID federation to the agency identity provider, and a subscription topology that supports multiple downstream system ATOs without environment sprawl.
- Defense industrial base migration to Azure Government or GCC High. DIB contractor operating workloads in commercial cloud or on-premises requires migration to Azure Government or GCC High to meet contract clauses for CUI or controlled technical information. Engagement delivers landing zone, migration wave plan, workload re-platforming where required, and continuous compliance posture on the regulated surface.
- Regulated mid-market hybrid or multi-cloud architecture. Regulated mid-market buyer requires hybrid architecture (on-premises + Azure) or multi-cloud architecture (Azure + AWS) to meet sovereignty, latency, or vendor-concentration requirements. Engagement delivers landing zone discipline on each surface with consistent identity, policy, and observability posture across surfaces.
- Enterprise legacy platform migration to Azure cloud. Enterprise buyer operating a legacy on-premises platform (ERP, line-of-business application, or data platform) requires migration to Azure with handling of legacy customizations, data complexity, and process flows that do not map cleanly to a modern cloud platform. Engagement delivers landing zone foundation, phased migration sequencing, and post-migration workload optimization.
Capability Summary
What the engagement delivers
- Azure landing zone design and deployment per Cloud Adoption Framework Enterprise-Scale
- FedRAMP-aligned reference architecture for federal and regulated commercial buyers
- Infrastructure-as-code deliverables (Bicep or Terraform)
- Migration wave planning and workload onboarding
- Network design (hub-and-spoke or Virtual WAN), Azure Policy baseline, Defender for Cloud posture
- Entra ID integration and identity-driven access control
- FinOps practice activation and continuous cost optimization
- Compatible with Azure Commercial, Azure Government, GCC, GCC High (within buyer's certified envelope)
- Multi-cloud and hybrid delivery — AWS, Google Cloud, VMware, on-premises integration
- Senior workstream leadership; documentation-first delivery posture
Posture Note
FedRAMP framing and authorization scope
Cornerstone Systems Group delivers FedRAMP-aligned reference architecture on Azure cloud surfaces that hold their own FedRAMP authorization (Azure Commercial High baseline regions, Azure Government, GCC, GCC High). The system Authorization to Operate (ATO) is issued against the buyer's environment by the buyer's Authorizing Official; CSG does not represent itself as a FedRAMP-authorized service provider. CSG does not currently hold independent third-party certification under FedRAMP, Cybersecurity Maturity Model Certification (CMMC), ISO 27001, or equivalent frameworks. Where a solicitation requires firm-level certification, CSG will surface this posture in the response and route accordingly. Certification pathway is documented on the Government Acquisition reference page.
Request a capability brief
Scoping a greenfield Azure landing zone, planning a migration to Azure Government or GCC High, or evaluating a hybrid or multi-cloud architecture? Send a capability inquiry and we will respond within one business day.
Reviewing procurement fit? See Government Acquisition for North American Industry Classification System (NAICS) coverage, SAM registration status, and contract-vehicle pursuit posture.