Security Engineer

Iceberg; Greater London; On-site; GBP 85,000 - 120,000; Full time

Job summary

Iceberg is seeking a Senior Security Engineer to join its Cyber Security function in London. You will design and enhance security monitoring, focusing on a Microsoft-centric environment, and drive automation, threat detection, and proactive security initiatives.

In this high-impact role, you will collaborate with cross-functional teams, implement AI-intensive security solutions, and contribute to post-quantum security initiatives while operating in a regulated financial-services context.

Qualifications

• Strong experience in Security Engineering, Security Automation, Detection Engineering, or SIEM Engineering.
• Hands-on experience with Microsoft Sentinel and the wider Microsoft Security ecosystem.
• Experience building and maintaining security monitoring, detection, and response capabilities.
• Strong scripting and automation skills using PowerShell and/or Python.
• Experience with SOAR technologies, Logic Apps, playbooks, and workflow automation.
• Good understanding of Azure security services and cloud security principles.
• Experience integrating security tools and leveraging APIs for automation.
• Knowledge of threat detection methodologies, attack techniques, and security frameworks.
• Strong communication skills with the ability to work across technical and non-technical stakeholders.
• Experience within financial services or other highly regulated environments.
• Exposure to security innovation initiatives, AI security, or emerging technology programmes.
• Relevant Microsoft security certifications.

Responsibilities

• Design, build, and enhance security monitoring and detection capabilities across a Microsoft-centric environment.
• Engineer and optimise SIEM and security operations using Microsoft Sentinel.
• Develop security automation and orchestration workflows to improve response times and reduce manual effort.
• Build integrations across security tooling and infrastructure using APIs, scripting, and cloud-native technologies.
• Develop and maintain advanced threat detection use cases and monitoring controls.
• Collaborate with infrastructure, cloud, and application teams to improve security posture and resilience.
• Support threat modelling, security assessments, and proactive security initiatives.
• Evaluate emerging technologies and contribute to innovation programmes focused on AI, automation, and future security challenges.
• Participate in proof-of-concepts and strategic projects focused on evolving cyber security capabilities.

Skills

Security engineering

Automation

Detection engineering

SIEM engineering

PowerShell

Python

SOAR

Logic Apps

API automation

Azure security

Communication

Regulated environments

Tools

Microsoft Sentinel

Azure

SOAR technologies

Job description

We're supporting a leading global organisation in the search for a Senior Security Engineer to join a highly respected Cyber Security function responsible for protecting critical business services and driving the next generation of security capabilities.

This is an opportunity to join a forward-thinking team at the forefront of security engineering, automation, and emerging technologies. Alongside strengthening and enhancing core security capabilities, you'll play a key role in evaluating and implementing innovative solutions across areas such as AI-driven security, advanced automation, and post-quantum security initiatives.

You'll be working in a technically strong environment alongside experienced security professionals, engineers, architects, and technology leaders who are passionate about building scalable, proactive security capabilities.

What You'll Be Doing

• Design, build, and enhance security monitoring and detection capabilities across a Microsoft-centric security environment.


• Engineer and optimise SIEM and security operations capabilities using Microsoft Sentinel.


• Develop security automation and orchestration workflows to improve response times and reduce manual effort.


• Build integrations across security tooling and infrastructure using APIs, scripting, and cloud-native technologies.


• Develop and maintain advanced threat detection use cases and monitoring controls.


• Collaborate with infrastructure, cloud, and application teams to improve security posture and resilience.


• Support threat modelling, security assessments, and proactive security initiatives.


• Evaluate emerging technologies and contribute to innovation programmes focused on AI, automation, and future security challenges.


• Participate in proof-of-concepts and strategic projects focused on the evolution of the organisation's cyber security capabilities.

What We're Looking For

• Strong experience in Security Engineering, Security Automation, Detection Engineering, or SIEM Engineering.


• Hands‑on experience with Microsoft Sentinel and the wider Microsoft Security ecosystem.


• Experience building and maintaining security monitoring, detection, and response capabilities.


• Strong scripting and automation skills using PowerShell and/or Python.


• Experience with SOAR technologies, Logic Apps, playbooks, and workflow automation.


• Good understanding of Azure security services and cloud security principles.


• Experience integrating security tools and leveraging APIs for automation.


• Knowledge of threat detection methodologies, attack techniques, and security frameworks.


• Strong communication skills with the ability to work across technical and non‑technical stakeholders.


• Experience within financial services or other highly regulated environments.


• Exposure to security innovation initiatives, AI security, or emerging technology programmes.


• Relevant Microsoft security certifications.

Why Apply?

This is more than a traditional security engineering role.

You'll have the opportunity to influence how a major organisation approaches modern cyber defence while working on projects that extend beyond day-to-day operations. From advanced automation and AI-enabled security capabilities through to future‑facing initiatives around post-quantum security, you'll help shape the next generation of cyber security strategy and engineering.

If you're passionate about security engineering, automation, and emerging technologies, and want to work within a high‑performing team tackling complex security challenges at scale, we'd love to hear from you.