Principal IT Security Engineer – Trading

Principal IT Security Engineer – Windows, Automation, Endpoint SecurityIndustry leading compensation London – HybridQuant 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 doingDesigning and implementing security controls across Windows platformsDriving vulnerability management initiatives and closing out remediation at scaleBuilding automation around configuration, monitoring, and incident responseImproving endpoint security: EDR, AV, patching, OS hardeningWorking with core infrastructure (AD / Entra ID, PKI, networking)Investigating emerging threats and advising on technical riskSupporting global IT teams across a large distributed environmentWhat you’ll needStrong Windows security engineering experienceSolid understanding of host-based controls: application control, firewalling, logging, encryptionHands-on with endpoint protection, EDR, scanning and patching toolsExperience with OS hardening, privileged access concepts, identity and security best practiceKnowledge of common attack techniques and how to counter themGood grasp of Active Directory/Entra ID and PKIHigh level PowerShell programming skillsClear communicator, reliable, collaborative, able to influence technical decisionsThis role suits someone who wants real ownership, thrives under pressure, and enjoys solving complex security problems at scale.Discretion guaranteed — we never share profiles without your approval.