Senior Microsoft Sentinel / SIEM Engineer

JR United Kingdom; Basildon; Remote; GBP 70,000 - 85,000; Full time

Job summary

A prominent security consultancy seeks a Senior Microsoft Sentinel / SIEM Engineer. This fully remote role offers up to £85,000 plus benefits, allowing for significant hands-on experience with nation-state threat investigations, advanced detection capabilities, and direct collaboration with Microsoft’s product teams.

Benefits

Direct access to Microsoft Sentinel product teams

Fully remote work culture

Career progression opportunities

Qualifications

• Experience with Microsoft Sentinel implementation in enterprise environments.
• Scripting skills in Python and PowerShell desirable.
• Understanding of security telemetry across multiple environments.

Responsibilities

• Optimize log onboarding into Microsoft Sentinel.
• Partner with incident response teams to address real attacks.
• Develop and enhance custom Function Apps and ingestion pipelines.

Skills

Log ingestion

Cyber threat detection

Scripting

Integration of Microsoft Sentinel

Job description

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Senior Microsoft Sentinel / SIEM Engineer, basildon

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Client:

Cloud Decisions

Location:

basildon, United Kingdom

Job Category:

Other

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EU work permit required:

Yes

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Job Views:

3

Posted:

31.05.2025

Expiry Date:

15.07.2025

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Job Description:

Job Title:

To £85,000 + Benefits + Microsoft

Fully Remote, UK

(*Global Microsoft Managed MISA Partner

+ complex Sentinel Engineering/Integration)

The Opportunity

This is a standout opportunity for a Microsoft Sentinel expert to step into a high-impact, technically advanced role with a global security Microsoft powerhouse.

You'll be joining a Microsoft managed global partner, a prominent MISA member, a team with Security MVP's and a Microsoft Verified Safe XDR Solution Partner, and a trusted Security Depth Partner.

In short giving you unparalleled access to Microsoft’s security product roadmap, security previews, and frontline support.

You'll work at the sharp end of cyber defence, directly contributing to investigations involving nation-state threat actors (including IR, CH, and NK based campaigns) while refining your craft across enterprise-scale log ingestion and customised Sentinel integration engineering that will stretch your skills, give you opportunity to ingest complex logs from a mass of cloud and data sources and the chance to learn these as you go.

The Role

You'll own and optimise enterprise-wide log onboarding into Microsoft Sentinel – deploying standard and custom connectors, Function Apps, and parsers to build tailored SIEM solutions that drive real-world threat detection and response.

• Log ingestion at scale across numerous hybrid and multi-cloud environments
• Enhance custom Function Apps and ingestion pipelines
• Parse, normalise, and optimise log telemetry to ensure precision and cost control
• Partner with IR teams on real attacks – tuning rules against live threat actor activity
• Sync closely with Microsoft teams to build cutting-edge detection capabilities
• Contribute to internal knowledge base and help shape engineering standards

What's needed?

• Experience building and integrating complex Microsoft Sentinel at SMC and enterprise
• Understanding of security telemetry across identity, endpoint, cloud, and network layers
• Experience in SIEM content development, including KQL, analytics rules, and custom data connectors
• Scripting and engineering skills – Python, PowerShell, APIs, Function Apps
• A background in cyber threat detection, incident response or DFIR is a real plus
• Comfortable working in very fast-moving, customer facing delivery environments

The Technical Shizzle:

• PowerShell, Python, REST APIs
• Log ingestion and parsing across multi platforms (Azure/AWS/GCP, M365, Defender, Entra, Copilot, Carbon Black, Okta + Tier 1 Network vendors)
• MITRE ATT&CK, threat detection frameworks, IOC enrichment
• Ability to go and work things out is crucial
• Sentinel/Log Analytics Cost Management and Data Optimisation

What’s In It for You?

• Direct access to Microsoft Sentinel product teams and early feature previews
• Deep involvement in real-world nation-state attack detection
• Huge opportunity to stretch and sharpen you Sentinel mastery
• Be part of a Microsoft Security elite MISA and Depth partner
• Exposure to multi-cloud detection and advanced security automation
• Fully remote, highly flexible work culture with global team collaboration
• Recognition, career progression and growth all within a global Microsoft specialist and respected security consultancy