Remote Security Engineer: Defender XDR & Sentinel Expert

Hamilton Barnes Associates Limited; Greater London, Cardiff; Hybrid; GBP 41,000 - 50,000; Full time

Benefits offered by this job

Primarily remote work

Occasional office attendance (London /

Client-facing responsibilities

Job summary

Hamilton Barnes Associates Limited is seeking an experienced Security Engineer to join its Security Operations function. The role focuses on Microsoft Defender XDR, Microsoft Sentinel, and Microsoft 365 security, with client exposure and a primary remote work setup with occasional London or Cardiff office visits.

You will design and optimise security controls, develop detections, manage vulnerability assessments, and contribute to incident response.

Qualifications

• Extensive security engineering or senior security analysis experience.
• Strong Microsoft Defender XDR and Sentinel experience.
• Deep knowledge of KQL and Advanced Hunting.
• Experience with vulnerability scanning and risk analysis.
• Proven ability to communicate technical findings to clients and stakeholders.
• Experience producing professional security reports.

Responsibilities

• Design, implement and optimise security controls.
• Develop detection capabilities using KQL and Advanced Hunting.
• Build and maintain Microsoft Sentinel analytical rules.
• Deploy and manage Content Hub solutions.
• Tune Defender policies and security configurations.
• Lead vulnerability scanning activities and analyse results.
• Produce structured security reports and recommendations.
• Present findings to clients and stakeholders.
• Support remediation activities and incident response investigations.
• Develop and improve incident response playbooks.
• Automate security processes using Azure Logic Apps.

Skills

Microsoft Defender XDR

Microsoft Sentinel

KQL

Advanced Hunting

vulnerability analysis

incident response

security reports

client-facing communication

Job description

Hamilton Barnes Associates Limited is seeking an experienced Security Engineer to join its Security Operations function. The role focuses on Microsoft Defender XDR, Microsoft Sentinel, and Microsoft 365 security, with client exposure and a primary remote work setup with occasional London or Cardiff office visits.

You will design and optimise security controls, develop detections, manage vulnerability assessments, and contribute to incident response.