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Senior Microsoft 365 Engineer

Job in Greater London, London, Greater London, W1B, England, UK
Listing for: Go Fractional
Full Time position
Listed on 2026-09-26
Job specializations:
  • IT/Tech
    M365, SharePoint & Power Platform, Cybersecurity, 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

Senior Microsoft 365 Engineer

Location: London, UK

Contract: 4-Month Fixed Term Contract

Work Arrangement: Onsite role

Role Summary

We are seeking an experienced Senior Microsoft 365 Engineer to design, implement, administer, and optimize Microsoft 365 services across a large enterprise environment. The role focuses on collaboration, messaging, identity, security, governance, and automation within the Microsoft ecosystem.

Key Responsibilities
  • Design and support Microsoft 365 services including Exchange Online, Teams, SharePoint Online, One Drive, Power Platform, and Entra .
  • Provide Tier 3 support for complex identity, collaboration, and messaging issues.
  • Manage Microsoft 365 tenant administration, licensing, governance, and user lifecycle management.
  • Implement and maintain security, compliance, retention, and information protection solutions.
  • Administer Entra , Hybrid Identity, Conditional Access, MFA, and Identity Governance.
  • Manage Exchange Online mail flow, transport rules, messaging security, and hybrid environments.
  • Develop automation using Power Shell and Microsoft Graph API.
  • Monitor platform health, performance, security, and adoption trends.
  • Create technical documentation, operational procedures, and knowledge articles.
  • Collaborate with security, infrastructure, and business teams on enterprise solutions.
  • Mentor junior engineers and contribute to Microsoft 365 roadmap and architecture decisions.
Required Skills & Experience
  • 7+ years of infrastructure/platform engineering experience.
  • 5+ years of Microsoft 365 engineering and administration experience.
  • Strong hands-on expertise in:
    • Exchange Online
    • Microsoft Teams
    • SharePoint Online
    • One Drive for Business
    • Microsoft Entra
    • Power Platform
  • Experience with:
    • Hybrid Identity and Active Directory integration
    • Conditional Access and MFA
    • Microsoft Purview, DLP, Sensitivity Labels, Retention & eDiscovery
    • Power Shell scripting and automation
    • Microsoft Graph API
    • Enterprise-scale Microsoft 365 environments
    • Governance, security, and compliance frameworks
    • Git/Git Hub
Preferred Skills
  • Microsoft Defender for Office 365
  • Microsoft Defender XDR
  • Microsoft Copilot for Microsoft 365
  • Power Apps, Power Automate, and Power BI administration
  • Multi-tenant/global Microsoft 365 environments
Certifications (Preferred)
  • Microsoft 365 Certified:
    Enterprise Administrator Expert
  • Microsoft Certified:
    Identity and Access Administrator Associate
  • Microsoft Certified:
    Messaging Administrator Associate
Position Requirements
10+ Years work experience
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