Security Engineer – Sentinel & Defender XDR (Remote)

Company: Tria
Apply for the Security Engineer – Sentinel & Defender XDR (Remote)
Location: Cardiff
Job Description:

Tria is seeking a Security Engineer to work on Microsoft Sentinel and Defender XDR in Cardiff with remote flexibility (3/4 days onsite per month). This permanent role focuses on engineering, incident response escalations, and strengthening client environments.

You will build detection rules, configure Defender XDR and Office 365 security controls, and develop automation using Azure Logic Apps. Strong communication and independent ownership are essential for progression.

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Posted: October 3rd, 2026