Security Engineer -M365 E5/Defender XDR/Sentinel/Azure AD

Tria; Milton Keynes; Hybride; GBP 112 000 - 147 000; Plein temps

Résumé du poste

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.

Connaissances

Security Engineer

Defender XDR

Microsoft Sentinel

Entra ID / Azure AD

IAM

Microsoft 365 E5 Security

Security monitoring

Incident response

D365 security

Azure

Outils

PowerShell

Microsoft Defender XDR

Microsoft Sentinel

Azure AD / Entra ID

Description du poste

Location

Location: Milton Keynes (Hybrid - 2 Days Onsite)

Contract Type

Contract Type: Outside IR35

Day Rate

Day Rate: Up to £700 per day

Duration

Duration: Initial 6 Months (with potential extension)

Role Overview

We are seeking an experienced Security Engineer to support and enhance our Microsoft security capabilities across infrastructure, cloud, identity, and business applications. This is a hands-on contract opportunity for a security professional with strong expertise across the Microsoft security stack, including Defender XDR, Microsoft Sentinel, Entra ID, and Dynamics 365. The successful candidate will play a key role in strengthening security operations, improving threat detection, enhancing monitoring capabilities, and securing critical business platforms.

Essential Skills & Experience

• Proven experience working as a Security Engineer, Cyber Security Engineer, or Security Operations Engineer.
• Strong hands-on experience with: Microsoft Defender XDR
• Strong hands-on experience with: Microsoft Sentinel (SIEM/SOAR)
• Strong hands-on experience with: Microsoft Entra ID (Azure Active Directory)
• Strong hands-on experience with: Identity and Access Management (IAM)
• Strong hands-on experience with: Microsoft 365 E5 Security
• Strong hands-on experience with: Security monitoring and detection engineering
• Strong hands-on experience with: Incident response and threat investigation
• Strong hands-on experience with: Dynamics 365 (D365) security administration and monitoring
• Experience designing and implementing enterprise security monitoring and threat detection solutions.
• Strong understanding of Microsoft cloud security architecture and best practices.
• Experience working within Azure-based environments.
• Ability to operate independently and deliver security outcomes in a fast-paced environment.

Desirable Skills

• Microsoft certifications such as: SC-200 Microsoft Security Operations Analyst
• Microsoft certifications such as: SC-300 Identity and Access Administrator
• Microsoft certifications such as: AZ-500 Azure Security Engineer Associate
• Microsoft certifications such as: SC-100 Cybersecurity Architect
• PowerShell scripting and automation experience.
• Previous experience within regulated or enterprise-scale environments.

If you are a hands-on Security Engineer with deep expertise across Defender XDR, Sentinel, Entra ID, IAM, and Microsoft security technologies, we'd like to hear from you