Infrastructure Architect & M&A integration

Lorien; Greater London; Hybrid; GBP 60,000 - 90,000; Full time

Job summary

A leading technology consultancy in Greater London is seeking an experienced Infrastructure Architect with Tenant-to-Tenant and M&A integration expertise. This role focuses on delivering architectural solutions across cloud and on-premise platforms while leading multiple integration projects. Candidates should have a proven track record with Microsoft 365, Azure technologies, and strong experience in global-scale migrations. The position offers a hybrid working model with a contract duration of 6 months and a start date as soon as possible.

Qualifications

• Extensive experience in infrastructure cloud architecture with Microsoft Azure.
• Experience delivering large-scale integrations or migrations.
• Strong communication and documentation skills.

Responsibilities

• Deliver architectural solutions across cloud and on-premise platforms.
• Collaborate with technical teams and leadership.
• Align with organisational and regulatory requirements.

Skills

Tenant-to-Tenant migrations

Azure technologies

Microsoft 365

Infrastructure cloud architecture

ITIL change management

Tools

Azure IaaS

Azure PaaS

Exchange Hybrid Mode

Job description

Infrastructure Architect with Tenant & Tenant / M&A integration

Job Type

Contract/Temporary

Location

London

Job Ref

BBBH173037_1768566503

Date Added

January 16th, 2026

Consultant

Louis Poynter

Infrastructure Architect with Tenant‑to‑Tenant / M&A integration
Contract: 6 months initially
Status: Outside IR35
Working Model: Hybrid/Remote - 3 days onsite / 2 days from home
Start: ASAP

An exciting opportunity for an experienced Infrastructure & Cloud Architect with Tenant‑to‑Tenant / M&A integration experience to join a specialist M&A Integration team delivering a major international technology integration programme. This role suits someone with deep hands‑on infrastructure and cloud expertise, and strong experience in global-scale migrations or acquisition‑led transformation. The Infrastructure Architect with Tenant‑to‑Tenant / M&A integration experience is grounded in expertise with Microsoft 365, Integrations or Migrations and Azure technology; and not DevOps focused experience.

The Role

The Infrastructure & Cloud Architect with Tenant‑to‑Tenant / M&A integration will play a key part in multiple concurrent integration projects, providing hands‑on architecture, solution design, and technical delivery support across on‑premises and Microsoft cloud environments. You'll collaborate with technical teams, business units, and leadership, working in a fast‑paced environment with significant change and evolving priorities.

Responsibilities for the Infrastructure & Cloud Architect with Tenant‑to‑Tenant / M&A integration

Service Delivery & Architecture

• Deliver high‑quality architectural solutions across cloud and on‑prem platforms.
• Support engineering teams throughout technical delivery.
• Produce high‑ and low‑level designs to governance standards.
• Maintain documentation and accurate solution records.

Stakeholder Engagement

• Build strong relationships with business units.
• Provide guidance, updates, and technical leadership to cross‑functional teams.
• Communicate clearly with stakeholders at all levels.

Governance & Compliance

• Align with all organisational, legal, and regulatory requirements.
• Ensure correct processes, approvals, and documentation are followed.
• Report progress, risks, and issues to senior management.

Must‑Have Experience for the Infrastructure & Cloud Architect with Tenant‑to‑Tenant / M&A integration

• Tenant‑to‑Tenant migrations or significant M&A integration experience in large, global organisations (ideally within financial services).
• Deep expertise across Microsoft 365, including enterprise‑level migrations and integration work.
• Proven experience delivering large‑scale integrations or migrations across cloud and on‑prem environments.
• Extensive hands‑on experience with Azure technologies (IaaS, PaaS, security, networking).
• Infrastructure cloud architecture background (non‑DevOps).
• Experience designing solutions aligned with security and governance requirements.
• Experience in corporate acquisition environments involving cross‑forest data/application migrations.
• Practical, recent experience with cross‑tenant M365 migrations.
• Migration experience to Azure or between datacentres.
• Strong knowledge of Exchange Hybrid Mode, M365 client‑side requirements, and backend architecture.
• Experience working within ITIL change management governance.

The role requires

• Extensive experience in an infrastructure cloud architecture position working primarily with Microsoft Azure & M365 technologies
• Experience of architecting solutions to meet security and governance requirements
• Excellent documentation and presentation skills, being able to document solutions clearly and a high and low level, and present to governing boards prior to technical implementation
• Ability to assist with the technical delivery of solutions for multiple projects maintaining the agreed solution design
• Experience of working within ITIL change management governance
• Ability to lead and provide guidance to infrastructure engineers
• Excellent communication skills, to be highly collaborative with the current team, management structure and business leaders

Technical Skills Required

• Experience with corporate acquisition projects involving cross forest application & data migration
• Recent experience of performing cross tenant M365 migrations
• Experience migrating workloads to Azure, or between datacentres
• Azure IaaS & PaaS architecture, including security and networking principles
• Experience in Exchange Hybrid Mode environments, good understanding of M365 client‑side requirements as well as backend
• Good understanding of networking technologies, 3rd party firewalls, routing protocols, Azure based networking

Technical Skills (Desirable)

• 3rd party M365 migration tool experience
• Experience with 3rd party email gateways such as Mimecast
• Experience with Endpoint Manager/Intune, Windows Autopilot
• Azure AD/Entra ID experience including Azure AD B2B, Conditional Access Policies and App Registrations
• Architecture framework experience, e.g. TOGAF certified

Guidant, Carbon60, Lorien & SRG The Impellam Group Portfolio are acting as an Employment Business in relation to this vacancy.