Senior Security Engineer (Defender, PurView)

We’re looking for a Senior Security Engineer for our client in the data sector, based in London, on an initial 3 to 6 month contract paying up to £500 per day Outside IR35.

This role offers hybrid working with an expectation to attend the office 3 days per week.

You will focus on hands-on remediation across Azure and endpoint environments, improving Defender for Cloud findings, closing vulnerabilities, and strengthening security posture. The role is delivery-led and ideal for someone who enjoys fixing issues rather than only advising.

The successful Senior Security Engineer will have experience with:

• Defender for Cloud, Defender for Endpoint and EASM
• Vulnerability remediation and Secure Score improvement
• Purview (DLP, sensitivity labels, insider risk)
• Compliance uplift for ISO 27001, SOC 2, GDPR and NIS2
• Configuration hardening, patching and policy deployment
• Entra ID, Conditional Access, PIM and cloud identity controls
• PowerShell and Microsoft Graph for automation

Nice to have: Sentinel exposure, Zero Trust knowledge, regulated-sector experience.

Certifications required: AZ-500, SC-100 (or working towards), plus one of MS-500, SC-400 or SC-900.