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Cloud migration architecture roadmap with landing zone guardrails

Infrastructure + apps leadership • Enterprise IT • 6 weeks

Enabled safer migration with reference architectures, guardrails, and sequencing.

Snapshot

Services

  • Enterprise Architecture

Deliverables

  • Landing zone baseline requirements (high-level)
  • Reference architectures (3 workload types)
  • App segmentation + dependency tiers
  • Migration roadmap (prioritized waves)
  • Guardrails + review checklist

Context

  • Engagement: 6-week cloud migration roadmap + reference architecture
  • Timeline: 6 weeks
  • Client: Infrastructure + apps leadership
  • Industry: Enterprise IT
  • Portfolio migration with varied workloads and dependency complexity
  • Security baseline uncertainty created delays and exceptions late in delivery
  • Needed repeatable patterns and a sequencing model to reduce program risk

Constraints

  • Baseline controls had to be implementable without extended platform rebuilds
  • Reference architectures needed to cover the most common workload types first
  • Sequencing had to balance risk tiers with delivery capacity

Challenge

Cloud adoption was blocked by uncertainty: inconsistent patterns, unclear security baselines, and no sequencing for high-dependency systems.

How we worked

  • Established a landing zone baseline (identity, network, logging, controls)
  • Published reference architectures to reduce one-off design decisions
  • Segmented applications by dependencies and risk to guide sequencing
  • Built a wave-based roadmap aligned to capacity and risk tiers

What we did

  • Defined landing zone baseline (identity, networking, logging, security controls)
  • Created reference architectures for common workload types
  • Built an application segmentation and sequencing model
  • Produced a migration roadmap tied to delivery capacity and risk tiers

Outcomes

  • Environment provisioning: ↓ from days to <2 hours (baseline in place)
  • Migration lead time variance: ↓ ~30% (more predictable waves)
  • Security baseline adherence: Established (standard controls)

Proof

  • Landing zone baseline requirements (high-level) + review checklist
  • Reference architectures (high-level) for common workload types
  • Migration sequencing model based on dependency tiers
  • Roadmap wave plan (prioritized migrations)

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