Multi-Subscription Cloud Security Enhancement with Microsoft Defender for Cloud

Strengthened cloud security posture and centralised security management across multiple Azure subscriptions for a mid-sized enterprise operating in hybrid and cloud environments.

The project focused on improving visibility across cloud resources, reducing security misconfigurations, strengthening compliance alignment, and implementing continuous monitoring and automated remediation capabilities using Microsoft Defender for Cloud.

Challenges

  • Inconsistent security controls across Azure subscriptions

  • Exposure of critical resources to public networks

  • Low Secure Score and cloud security posture visibility

  • Delayed detection of cloud security threats

  • Manual remediation processes creating operational overhead

  • Compliance requirements for ISO 27001 and GDPR

Security Improvements Delivered

  • Implemented Microsoft Defender for Cloud across multiple subscriptions

  • Enabled continuous security assessment and Secure Score monitoring

  • Strengthened cloud workload protection for VMs, storage, SQL, and applications

  • Restricted public access to critical cloud resources

  • Implemented automated remediation and policy enforcement

  • Integrated alerts and monitoring with Microsoft Sentinel

  • Improved cloud security dashboards and compliance visibility

  • Delivered operational guidance and cloud security recommendations

Technologies & Security Areas

  • Microsoft Defender for Cloud

  • Microsoft Sentinel

  • Azure Security & Governance

  • Cloud Security Posture Management (CSPM)

  • Secure Score Optimisation

  • Vulnerability Management

  • Cloud Threat Detection

  • Security Monitoring & Automation

  • ISO 27001 & GDPR Alignment

Results & Outcomes

  • Improved Secure Score across all subscriptions

  • Reduced exposure to cloud security risks and misconfigurations

  • Strengthened cloud governance and security visibility

  • Improved compliance alignment with ISO 27001 and GDPR

  • Reduced manual remediation effort through automation

  • Enhanced threat monitoring and cloud security resilience

  • Improved operational efficiency and response capabilities