Senior Microsoft Sentinel / SIEM Engineer

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

Job summary

A leading global Microsoft security consultancy is seeking a Senior Microsoft Sentinel / SIEM Engineer for a fully remote role. This position involves optimizing log ingestion and enhancing threat detection capabilities while working on real-world cyber defense operations. The successful candidate will collaborate with elite Microsoft teams and contribute to high-impact security solutions.

Benefits

Access to Microsoft Sentinel product teams

Involvement in nation-state attack detection

Fully remote, flexible work environment

Qualifications

• Experience building complex Microsoft Sentinel solutions at SMC and enterprise levels.
• Understanding of security telemetry across identity, endpoint, cloud, and network layers.
• Ability to work in fast-paced, customer-facing environments.

Responsibilities

• Own and optimize enterprise-wide log onboarding into Microsoft Sentinel.
• Enhance custom Function Apps and ingestion pipelines.
• Collaborate with Microsoft teams to improve detection capabilities.

Skills

PowerShell

Python

REST APIs

Proactive problem-solving

Job description

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Senior Microsoft Sentinel / SIEM Engineer, Colchester

Client: Cloud Decisions

Location: Colchester, United Kingdom

Job Category: Other

EU work permit required: Yes

Job Views: 6

Posted: 09.06.2025

Expiry Date: 24.07.2025

Job Description:

Job Title: Senior Microsoft Sentinel / SIEM Engineer

Salary: Up to £85,000 + Benefits + Microsoft

Location: Fully Remote, UK

Company: Global Microsoft Managed MISA Partner

Specialization: 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 join 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 offers unparalleled access to Microsoft’s security product roadmap, security previews, and frontline support.

You will 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. This includes ingesting complex logs from various cloud and data sources and learning these as you go.

The Role

• 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.
• Manage log ingestion at scale across hybrid and multi-cloud environments.
• Enhance custom Function Apps and ingestion pipelines.
• Parse, normalize, and optimize log telemetry for accuracy and cost efficiency.
• Partner with IR teams on real attacks, tuning rules against active threat campaigns.
• Collaborate with Microsoft teams to develop advanced detection capabilities.
• Contribute to internal knowledge bases and help establish engineering standards.

Requirements

• Experience 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: Python, PowerShell, APIs, 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.
• Proactive 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.
• Fully remote, flexible work environment with a global team.
• Recognition, career growth within a respected Microsoft security consultancy.