Senior Microsoft Sentinel / SIEM Engineer

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

Job summary

A leading cybersecurity consultancy in Bedford is seeking a Senior Microsoft Sentinel / SIEM Engineer to join their team. This role involves optimizing log ingestion and collaborating on threat detection with Microsoft teams. Offering a competitive salary up to £85,000, this position provides exposure to advanced security practices in a flexible, remote work environment.

Benefits

Access to Microsoft Sentinel product teams

Remote, flexible work culture

Career growth opportunities

Qualifications

• Experience building complex Microsoft Sentinel solutions.
• Knowledge of security telemetry across various layers.
• Scripting skills in Python and PowerShell are essential.

Responsibilities

• Optimize enterprise-wide log onboarding into Microsoft Sentinel.
• Enhance and develop custom connectors and Function Apps.
• Collaborate with IR teams on live attack tuning.

Skills

Building and integrating complex Microsoft Sentinel solutions

Security telemetry understanding

SIEM content development

Scripting in Python

Scripting in PowerShell

Cyber threat detection

Tools

Microsoft Sentinel

PowerShell

Python

REST APIs

Job description

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Senior Microsoft Sentinel / SIEM Engineer, Bedford

Client: Cloud Decisions

Location: Bedford, United Kingdom

Job Category: Other

EU work permit required: Yes

Job Views: 3

Posted: 31.05.2025

Expiry Date: 15.07.2025

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 MVPs and a Microsoft Verified Safe XDR Solution Partner, and a trusted Security Depth Partner.

This role provides unparalleled access to Microsoft’s security product roadmap, security previews, and frontline support.

You'll work at the forefront of cyber defense, directly contributing to investigations involving nation-state threat actors (including IR, CH, and NK based campaigns) while refining your skills across enterprise-scale log ingestion and customized Sentinel integration engineering, offering opportunities to ingest complex logs from various cloud and data sources.

The Role

You'll own and optimize enterprise-wide log onboarding into Microsoft Sentinel—deploying standard and custom connectors, Function Apps, and parsers to build tailored SIEM solutions that enhance threat detection and response.

• Log ingestion at scale across hybrid and multi-cloud environments
• Enhance custom Function Apps and ingestion pipelines
• Parse, normalize, and optimize log telemetry for precision and cost efficiency
• Collaborate with IR teams on live attacks, tuning rules against active threat actor campaigns
• Work closely with Microsoft teams to develop advanced detection capabilities
• Contribute to internal knowledge base and engineering standards

Requirements

• Experience with building and integrating complex Microsoft Sentinel solutions at SMC and enterprise levels
• 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 in Python, PowerShell, APIs, and Function Apps
• Background in cyber threat detection, incident response, or DFIR is a plus
• Ability to work in fast-paced, customer-facing environments

Technical Skills

• PowerShell, Python, REST APIs
• Log ingestion and parsing across multiple platforms (Azure/AWS/GCP, M365, Defender, Entra, Copilot, Carbon Black, Okta, Tier 1 Network vendors)
• Knowledge of MITRE ATT&CK, threat detection frameworks, IOC enrichment
• Problem-solving skills
• Sentinel/Log Analytics Cost Management and Data Optimization

Benefits

• Access to Microsoft Sentinel product teams and early feature previews
• Involvement in real-world nation-state attack detection
• Opportunities to develop Sentinel expertise
• Part of a Microsoft Security elite MISA and Depth partner
• Exposure to multi-cloud detection and security automation
• Remote, flexible work culture with global collaboration
• Career growth within a respected security consultancy