Security Engineer: Defender XDR, Sentinel & Entra ID Expert

Tria; Milton Keynes; Hybrid; GBP 112,000 - 147,000; Full time

Job summary

Tria is seeking a hands-on Security Engineer in Milton Keynes for a 6-month contract, with hybrid work (2 days onsite). You will strengthen security operations across infrastructure, cloud, identity, and business apps, focusing on Defender XDR, Sentinel, Entra ID, and D365 security.

The role demands deep Microsoft security expertise, threat detection improvements, and robust incident response capabilities in an Azure-based environment.

Qualifications

• Proven experience as a Security Engineer, Cyber Security Engineer, or SOC/SE role.
• Hands-on with Defender XDR and Sentinel SIEM/SOAR.
• Experience with Entra ID (Azure AD) and IAM concepts.
• Strong knowledge of Microsoft 365 E5 Security and security monitoring.
• Background in incident response and threat investigation.
• D365 security administration and monitoring expertise.

Skills

Security Engineer

Defender XDR

Microsoft Sentinel

Entra ID / Azure AD

IAM

Microsoft 365 E5 Security

Security monitoring

Incident response

D365 security

Azure

Tools

PowerShell

Microsoft Defender XDR

Microsoft Sentinel

Azure AD / Entra ID

Job description

Tria is seeking a hands-on Security Engineer in Milton Keynes for a 6-month contract, with hybrid work (2 days onsite). You will strengthen security operations across infrastructure, cloud, identity, and business apps, focusing on Defender XDR, Sentinel, Entra ID, and D365 security.

The role demands deep Microsoft security expertise, threat detection improvements, and robust incident response capabilities in an Azure-based environment.