IT & InfrastructureAdvanced 5 to 7 hours

Hybrid Cloud Architecture for a Mid-Size SA Company

Design a defensible hybrid cloud architecture for a 250-person SA business.

The Scenario

A 250-person SA mining services company has cloud-friendly workloads (email, collaboration, sales CRM) and workloads that must stay on-site (process control systems, video monitoring of sites with poor connectivity). The CIO wants a hybrid architecture that survives audit, supports growth, and does not create disaster recovery gaps.

The Brief

Design a target hybrid architecture covering compute, identity, networking, data, and security. Justify which workloads stay on-premise and which move to the cloud, and how the two halves are connected and governed.

Deliverables

  • An architecture diagram or text representation showing on-premise versus cloud workloads, identity flow, network connectivity (ExpressRoute, VPN, SD-WAN), and data flows
  • A workload classification table listing each major workload, its destination (on-premise / Azure / M365 / SaaS), the rationale, and the key risks of placement
  • A security and identity section covering: hybrid identity (AD Connect or Entra Connect), conditional access, network segmentation between cloud and on-premise, and key management
  • A disaster recovery overlay describing how the hybrid architecture supports recovery for both halves, with stated RTO and RPO tiers

Submission Guidance

Hybrid is harder than full cloud or full on-premise. Most failure modes happen at the boundary: identity sync failures, expired ExpressRoute peering, conflicting backup tools. Show that you have thought about the seams, not just the halves.

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