Senior Sentinel SIEM Engineer (Security Cleared)

Senior Sentinel SIEM Engineer (Security Cleared)

Job Type

Contract/Temporary

Location

Job Ref

BBBH88

Date Added

January 27th, 2026

Consultant

Lewis Baillie

Senior Sentinel SIEM Engineer

Reading or Havant - Hybrid working

Inside IR35 Contract

Lorien's Utilities client are currently recruiting for a Security Cleared Senior Sentinel SIEM Engineer to join on an inside IR35 contract basis.

As the Security Information & Event Monitoring (SIEM) Engineer, you are responsible for maintaining the SIEM platform. This includes onboarding log sources, developing analytic rules, creating automation for triage and remediation, and integrating with other Information Technology and other platforms at pace.

You will

• Develop the security monitoring platform, ensuring optimal performance, scalability, and integration with security tools.
• Participate in infrastructure projects to develop, plan, and implement solutions for security monitoring.
• Design, implement, and maintain detection rulesets. Scope, plan, and track log integrations.
• Guide, develop, and grow the SIEM Engineering team.
• Collaborate with the wider Threat Detection & Response team to ensure the SIEM platform meets their day-to-day needs and support incidents as necessary.

You have

• Extensive experience working with security logs across multiple domains - identity and access, network, system, data, application, cloud - and multiple product types.
• Proficiency in data analysis and scripting languages (e.g., PowerShell, Python).
• Strong Security Orchestration, Automation and Response (SOAR) knowledge.
• Experienced in Kusto Query Language (KQL)
• Team leadership experience with great collaboration and stakeholder management skills
• Candidates must have a valid and live SC clearance for this role.

Should this position be of interest please submit your CV and I will be in contact as required.

Guidant, Carbon60, Lorien & SRG - The Impellam Group Portfolio are acting as an Employment Business in relation to this vacancy.