La Fosse
Lead Infrastructure Engineer / Architect – M&A
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Lead Infrastructure Migration Engineer / Architect – M&A
£500 per day | Outside IR35 | 6-Month Contract
Remote – Extensive European Travel Required | Expenses Paid
We’re looking for a Lead Infrastructure Migration Engineer / Architect to join a major European M&A integration programme spanning 13 entities, 37 sites, and approximately 1,000 users.
This is not a traditional project management role. We’re looking for someone with strong hands-on technical infrastructure and architecture experience who can lead complex migration activity across multiple organisations, sites, and technology environments.
You’ll act as the technical lead across discovery, infrastructure assessment, migration planning, site readiness, cutover, and post-migration stabilisation, working across Azure, Microsoft 365, networking, servers, EUC, identity, and security.
What you'll be doing
- Lead technical discovery and assessment of infrastructure environments across multiple European entities and sites.
- Own the technical planning and coordination of infrastructure migration waves, cutovers, rollback, and hypercare.
- Assess current-state environments and define technical requirements for the target architecture.
- Work across Azure, Microsoft 365, Entra ID, Active Directory, Intune, networking, servers, endpoints, and security.
- Lead technical discussions with infrastructure engineers, architects, local IT teams, and third-party suppliers.
- Assess site readiness covering LAN/WAN, Wi-Fi, VPN, connectivity, devices, servers, cloud dependencies, telephony, and meeting-room technology.
- Identify technical blockers, dependencies, and risks and drive them through to resolution.
- Provide technical leadership during migration and cutover activities, ensuring business continuity and minimal user disruption.
- Produce and review technical migration plans, architecture documentation, runbooks, readiness assessments, and rollback plans.
- Act as the technical escalation point between the programme, engineering teams, acquired organisations, and suppliers.
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What we're looking for
- Strong background as a Lead Infrastructure Engineer, Infrastructure Architect, Technical Lead, or Migration Lead.
- Proven experience delivering complex infrastructure migrations, integrations, or M&A programmes.
- Strong hands-on technical knowledge of Microsoft Azure and associated infrastructure services.
- Strong understanding of Microsoft 365, Entra ID, Active Directory, Intune, and Windows endpoints.
- Solid infrastructure knowledge across LAN, WAN, Wi-Fi, VPN, DNS, DHCP, servers, cloud, and connectivity.
- Experience leading technical teams and third-party suppliers in complex, matrix environments.
- Strong understanding of migration architecture, technical dependencies, cutover, rollback, and hypercare.
- Excellent troubleshooting and problem-solving skills, with the ability to identify technical blockers before they impact delivery.
- Comfortable operating at both architectural and hands-on delivery level.
- Excellent communication skills and confidence working with engineers, architects, suppliers, and senior stakeholders.
- Extensive European travel is mandatory.
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Desirable
- Previous experience delivering M&A infrastructure integrations or multi-country migrations.
- Azure Migrate, Azure Monitor, Azure Backup, or Azure Site Recovery experience.
- Microsoft 365 tenant-to-tenant migration and identity consolidation experience.
- ServiceNow and ITIL/service transition experience.
- Microsoft Azure certifications such as AZ-104 or equivalent.
- Additional European language capability.
The opportunity
This is a highly visible technical leadership role within a large-scale European infrastructure integration programme. You’ll have significant ownership across the technical migration lifecycle and will be expected to lead from the front, challenge technical assumptions, and drive complex infrastructure migrations through to successful delivery.
Remote working with extensive travel across Europe.
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