Sumer
Infrastructure Technician
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Department: Operations - IT
Location: London Cavendish Square
Description
We are seeking an experienced IT Infrastructure Analyst to support a major transformation programme, consolidating multiple accountancy firms into a centralised Microsoft Azure environment.
This role will play a key part in migrating diverse legacy infrastructures (including on-premises and existing cloud estates) into a unified, secure, and scalable Azure platform. The contractor will work closely with internal IT teams, third-party vendors, and business stakeholders to ensure smooth and efficient transitions.
Key Responsibilities
- Manage and maintain Nutanix, Windows Server, Citrix, and wider infrastructure, ensuring performance, capacity, availability, and security.
- Administer Microsoft 365, Entra ID, Active Directory, and key business applications.
- Manage and troubleshoot network infrastructure, including LAN, WAN, WLAN, and routing.
- Plan and deliver infrastructure upgrades, migrations, and modernisation, including migration of servers, virtual machines, storage, file services, and applications to Azure.
- Support tenant consolidation, identity integration, and hybrid/cloud transformation across multiple entities.
- Assess and document existing on-premises, hybrid, and cloud environments, developing appropriate migration strategies.
- Provide Level 3 technical support, troubleshoot complex infrastructure issues, and maintain security, compliance, and governance standards.
- Work with project stakeholders to manage migration projects, risks, and documentation, providing technical handover and knowledge transfer to internal teams.
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Skills, Knowledge & Expertise
- Strong hands-on experience with Microsoft Azure, including Virtual Machines, Networking, Storage, Azure Migrate, and Entra ID.
- Proven experience delivering infrastructure migration and transformation projects, including migrations from VMware/Hyper-V and existing cloud platforms such as Azure and AWS.
- Strong understanding of networking, VPNs, firewalls, routing, cloud security, backup, and disaster recovery.
- Experience with Microsoft 365 tenant migrations, identity management, and hybrid environments.
- Strong troubleshooting and problem-solving skills, with the ability to resolve complex infrastructure issues.
- Good understanding of security, resilience, availability, and governance within enterprise IT environments.
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Desirable Experience
- Experience within professional services or accountancy firms
- Familiarity with accountancy platforms such as: CCH, IRIS, Caseware, Sage 50 accountancy and payroll
- Linux experience
- Veeam
- Powershell (including Powershell for Exchange)
- Experience working in professional services, financial services, or accountancy firms
Belong @ Sumer
At Sumer, we know everyone’s journey is different. That’s why we’re committed to fairness, removing barriers, and giving people the support they need to do their best work. If you need any support during the hiring process, just let us know.
Our values represent what matters most to us and guide how we work every day:
- We Shine Together
- We Do the Right Thing
- We Make It Count
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