Senior SOC Analyst Level 3. Microsoft Security stack | Ability to achieve SC Clearance

Job Title:
Senior SOC Analyst Level 3. Microsoft Security stack | Ability to achieve SC Clearance

Location:
Hybrid remote | London / Berkshire

Overview:
Senior SOC Analyst Level 3 to join a specialist Managed Security Services business. You will be responsible for advanced threat hunting / triage, incident response etc with a strong focus on the Microsoft Security Stack.

Key Responsibilities:

• Lead and resolve complex security incidents / escalations

• Conduct advanced threat hunting using the Microsoft Security Stack.

• Build, optimise and maintain workbooks, rules, analytics etc.

• Correlate data across Microsoft 365 Defender, Azure Defender and Sentinel.

• Perform root cause analysis and post-incident reporting.

• Aid in mentoring and upskilling Level 1 and 2 SOC analysts.

Required Skills & Experience:

• The ability to achieve UK Security Clearance (SC) – existing clearance ideal. (Sorry no visa applications)

• Current experience working with a SOC environment

Microsoft Sentinel:

• Development and tuning of custom analytic rules.

• Workbook creation and dashboarding.

• Automation using Playbooks and SOAR integration.

Kusto Query Language (KQL):

• Writing complex, efficient queries for advanced threat hunting and detection.

• Correlating data across key tables (e.g., SignInLogs, SecurityEvent, OfficeActivity, DeviceEvents).

• Developing custom detection rules, optimising performance, and reducing false positives.

• Supporting Sentinel Workbooks, Alerts, and Playbooks through advanced KQL use.

Additional Requirements:

• Must hold or be eligible to achieve a minimum of Security Clearance (SC) level.

• Nice to have certifications (e.g., SC-200, AZ-500, GIAC) are desirable.

• Strong problem-solving and analytical skills.

• Excellent communication for clear documentation and team collaboration.

• Please follow Wheaton’s Law.

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