The Role

The Senior Security Engineer is responsible for the day-to-day operation, maintenance, and optimisation of security platforms supporting a financial services client in a regulated environment.

This is a hands-on engineering role where you will ensure security tooling is fully operational, integrated, and performing as expected. You will work closely with the 24/7 Security Analyst team, supporting investigations, resolving platform issues, and driving improvements across detection and response capabilities.

This role is client-aligned with ~3 days onsite in London.

Key Responsibilities

* Maintain and configure security platforms including SIEM, XDR/EDR, vulnerability and cloud security tooling

* Perform lifecycle activities including patching, upgrades, and configuration changes

* Ensure security platforms are fully integrated across on-prem and cloud environments

* Monitor platform health, performance, and availab...