Infrastructure & Security Lead — Hybrid Cloud (Windows)

Quant Capital; Hounslow; Hybrid; GBP 54,000 - 90,000; Full time

Job summary

Quant Capital is hiring an Infrastructure Engineer to own core infrastructure and security across a modern Microsoft/Azure environment in South West London. The role emphasizes security-first thinking and uptime, with real responsibility from day one.

You’ll deliver projects across infrastructure, automation, and cloud security, handling Windows, networking, identity, cloud, and security end-to-end. Hybrid 2:3 in-office work model.

Qualifications

• Extensive experience with Windows Server and Windows Desktop.
• Strong networking knowledge: TCP/IP, VPNs, DNS.
• Security-focused with patching and hardening practices.
• Experience with Microsoft 365, Intune, Entra, and AD.
• Familiarity with SIEM, MFA, email security.
• Ability to lead an infra team and manage priorities.

Responsibilities

• Lead the day-to-day management and support of IT infrastructure services.
• Design, implement, and maintain secure, scalable, and resilient infrastructure solutions.
• Support our primarily Microsoft-based infrastructure, including hybrid cloud and on-premise.
• Oversee server, storage, network, backup, cloud and virtualization platforms.
• Ensure infrastructure availability, performance, and disaster recovery readiness.
• Maintain infrastructure security standards, patching, and compliance requirements.
• Monitor, identify, investigate, and respond to security threats and vulnerabilities.
• Manage endpoint protection, firewalls, SIEM, MFA, email security, and access controls.
• Implement and maintain security standards, policies, and best practices.
• Work with third-party security providers as required.
• Leadership and Team Management
• Lead and develop the small Infra team, strong leadership and people management skills.

Skills

Microsoft technologies

Windows Server

Active Directory

Azure / Hybrid Cloud

Network engineering

Security best practices

SIEM / MFA

Job description

Quant Capital is hiring an Infrastructure Engineer to own core infrastructure and security across a modern Microsoft/Azure environment in South West London. The role emphasizes security-first thinking and uptime, with real responsibility from day one.

You’ll deliver projects across infrastructure, automation, and cloud security, handling Windows, networking, identity, cloud, and security end-to-end. Hybrid 2:3 in-office work model.