Principal IT Security Engineer – Trading

Principal IT Security Engineer – Windows, Automation, Endpoint Security Industry leading compensation London – Hybrid Quant Capital is partnered with a leading trading firm looking to hire an IT Security Engineer to strengthen their global security posture. This role sits inside a high-performing engineering group and suits someone who can own technical decisions, cut through noise, and build security controls that scale.

You’ll work across Windows engineering, endpoint security, automation, vulnerability management and platform hardening. Expect a mix of hands-on engineering, advisory work, and proactive threat mitigation. The environment is fast-moving and technically demanding — you’ll be the person the wider IT team turns to for sound judgement and clarity.

What you’ll be doing

Designing and implementing security controls across Windows platforms

Driving vulnerability management initiatives and closing out remediation at scale

Building automation around configuration, monitoring, and incident response

Improving endpoint security: EDR, AV, patching, OS hardening

Working with core infrastructure (AD / Entra , PKI, networking)
Investigating emerging threats and advising on technical risk Supporting global IT teams across a large distributed environment

What you’ll need Strong Windows security engineering experience

Solid understanding of host-based controls: application control, firewalling, logging, encryption

Hands-on with endpoint protection, EDR, scanning and patching tools

Experience with OS hardening, privileged access concepts, identity and security best practice

Knowledge of common attack techniques and how to counter them

Good grasp of Active Directory/Entra  PKIHigh level Power Shell programming skills

Clear communicator, reliable, collaborative, able to influence technical decisions

This role suits someone who wants real ownership, thrives under pressure, and enjoys solving complex security problems cretion guaranteed — we never share profiles without your approval.