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Lead Infrastructure Engineer

Job in Oxford, Oxfordshire, OX1, England, UK
Listing for: Gravita
Full Time position
Listed on 2026-08-18
Job specializations:
  • IT/Tech
    Cybersecurity, Systems Engineer, Cloud Computing: Infrastructure & Operations
Salary/Wage Range or Industry Benchmark: 90000 - 120000 GBP Yearly GBP 90000.00 120000.00 YEAR
Job Description & How to Apply Below

We’re Gravita: the accountants fuelling ambitious businesses. We’re a full service, tech-enabled firm, working with entrepreneurs and businesses to help them achieve their goals, and make an impact in the world.

We’re growing fast and are bringing like-minded advisors together to form a full-service tech-enabled accounting partner for thousands of SMEs. Our team use their incredible expertise alongside intuitive technology to help businesses and entrepreneurs plan better and grow faster.

Our mission is to become the UK’s leading tech-enabled accounting firm for SMEs. We have ambitious goals and our high-calibre team work hard to achieve them. We are one team with one agenda, working collaboratively in a respectful environment to deliver a great service to our clients.

So if you join us, you’ll not only be working on exciting client challenges, you’ll also be helping us shape the future of accounting
.

The Role

The Lead Infrastructure Engineer is responsible for defining and delivering Gravita's technology infrastructure, cloud architecture and cyber security platforms. They are responsible for the design and setup, and then handing over the separate IT Support team for on-going day to day support.

The role provides leadership across Microsoft 365, Azure, cyber security, identity management, digital workplace technologies and infrastructure architecture, ensuring technology platforms remain secure, resilient, scalable and aligned to business objectives.

The postholder owns the architecture, configuration, security and technical oversight across a modern Microsoft-first environment supporting multiple UK offices and acquired businesses.

The position plays a key role in technology modernisation, acquisition integrations and the ongoing evolution of Gravita's cloud and security capabilities. As a growing business that places technology at the forefront of its operations and future growth, Gravita offers the opportunity to help shape and influence the future direction of its technology estate.

Key Responsibilities
  • Own Gravita's infrastructure and cloud roadmaps across Microsoft 365, Azure, Entra , Azure Virtual Desktop, Windows 365, identity, networking, end-user computing and backup and recovery.
  • Drive modernisation, cutting technical debt and improving resilience, security and efficiency, while keeping platforms scalable, supportable and consolidated.

Provide technical leadership across Microsoft 365, Azure, Entra , Intune, Exchange Online, SharePoint Online, One Drive, Teams, Defender, Purview and Azure Virtual Desktop.

  • Define architecture, configuration, technical standards, governance and best practice, ensuring secure configuration, lifecycle management, resilience, scalability and integration.
  • Set up core configurations across Azure landing zones, cloud infrastructure, virtual desktop, networking, storage, identity, collaboration and end-user computing, acting as senior technical authority for transformation programmes.
Cyber Security

Own infrastructure and security capability across Microsoft Defender XDR, Sentinel, Purview, endpoint security, identity protection, Conditional Access, privileged access management and Zero Trust.

  • Oversee security operations with security partners and SOC providers to improve monitoring, detection, incident response and threat visibility.
  • Drive cyber risk reduction, security governance, vulnerability and patch management, alert tuning, exposure reduction and continuous improvement of controls, evolving them with business needs and emerging threats.
  • Lead technically during major incidents and recovery, and support security assurance and compliance.
Identity & Access Management
  • Own enterprise identity architecture across Entra , hybrid identity, MFA, Conditional Access, Privileged Identity Management, identity governance and access reviews, applying least-privilege principles consistently.
Information Protection, AI & Governance
  • Lead technical configuration of Data Loss Prevention, data classification, information protection, records management, eDiscovery and Insider Risk through Microsoft Purview.
  • Ensure AI platforms run securely with appropriate governance, compliance,…
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