Head of IT - Security

We’re looking for a hands-on Head of IT to lead and evolve our internal technology, infrastructure and cyber security capability.

  • Hybrid Working - London
  • £110,000 - £140,000
  • F/S, Private Equity, Investment Management

This is a leadership role with real breadth. You’ll manage a small team of three/four, take ownership of our Microsoft environment, oversee cyber security and infrastructure performance, and make sure our technology estate is secure, reliable and fit for a high-performing international business.

You’ll be joining at an exciting point: our cloud migration is complete, so the focus is now on continuous improvement, resilience, security and smarter use of technology, not wholesale redesign.

What you’ll be doing

  • Leading and developing a team of 3 across support, applications and infrastructure
  • Owning day-to-day IT operations across a c.200-user UK/US business
  • Managing and improving our Microsoft estate, with a particular focus on Intune and Defender
  • Overseeing cyber security, infrastructure monitoring, patching, access controls, backup and recovery
  • Driving continuous improvement across the IT environment
  • Working closely with the Head of Compliance to support regulatory and security requirements
  • Managing third-party vendors, contracts and service reviews
  • Monitoring the use of emerging AI tools such as ChatGPT and Copilot
  • Supporting the business with a practical, service-led and enterprise-minded approach

What we’re looking for

  • Previous experience leading internal IT infrastructure and support in a hands-on environment
  • Strong Microsoft ecosystem expertise, especially Intune, Defender, Microsoft 365 and cloud infrastructure
  • Strong understanding of cyber security, operational resilience and IT governance
  • Experience managing vendors and external technology partners
  • Ability to balance strategic thinking with day-to-day delivery
  • Confident stakeholder manager who can work across technology, compliance and the wider business
  • Someone who enjoys being visible, approachable and engaged with users in the office

Job Details

Company
Siena Partnership
Location
London Area, United Kingdom
Hybrid / Remote Options
Posted