Security Engineer -M365 E5/Defender XDR/Sentinel/Azure AD
CV-LibraryMilton Keynes, BuckinghamshirecontractPosted: 6 November 2026
Apply NowSecurity Engineer - MS Defender, MS Sentinel, Azure ID/Entra ID, M365 E5
Location: Milton Keynes (Hybrid - 2 Days Onsite)
Contract Type: Outside IR35
Day Rate: Up to £700 per day
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
Microsoft Sentinel (SIEM/SOAR)
Microsoft Entra ID (Azure Active Directory)
Identity and Access Management (IAM)
Microsoft 365 E5 Security
Security monitoring and detection engineering
Incident response and threat investigation
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
SC-300 Identity and Access Administrator
AZ-500 Azure Security Engineer Associate
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
Location: Milton Keynes (Hybrid - 2 Days Onsite)
Contract Type: Outside IR35
Day Rate: Up to £700 per day
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
Microsoft Sentinel (SIEM/SOAR)
Microsoft Entra ID (Azure Active Directory)
Identity and Access Management (IAM)
Microsoft 365 E5 Security
Security monitoring and detection engineering
Incident response and threat investigation
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
SC-300 Identity and Access Administrator
AZ-500 Azure Security Engineer Associate
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