Microsoft System Administrator

🚀 Senior Microsoft 365 Administrator

📍
Hoddesdon, UK | 🏢
Hybrid (onsite & remote) + occasional UK travel

We’re recruiting a Senior Microsoft 365 Administrator to take ownership of the administration, optimisation, and security of a complex Microsoft 365 environment within a highly regulated, global organisation operating to ITIL / ISO standards
.

This is a hands‑on, senior technical role with real influence — ideal for someone who enjoys leading initiatives, acting as a technical authority, and mentoring others while driving continuous improvement.

You’ll be responsible for the end‑to‑end management of Microsoft 365 services
, ensuring stability, performance, security, and alignment with organisational goals. Acting as a subject matter expert
, you’ll lead migrations, enhancements, and optimisations, while supporting complex escalations and guiding junior team members.

The role involves a mix of strategic ownership and hands‑on delivery
, with collaboration across IT and business teams.

• Lead administration, management, and optimisation of Microsoft 365 services
• Own and deliver migrations, updates, and platform improvements
• Use Power Shell scripting and automation to drive efficiency and best practice
• Act as SME for complex escalations
  , troubleshooting and resolving issues
• Develop, document, and maintain processes, procedures, and standards
• Manage patch testing and deployment across end‑user devices
• Monitor and maintain security, compliance, and risk controls
• Mentor and support junior IT team members
• Collaborate cross‑functionally to align M365 initiatives with wider business goals
• Stay current with emerging Microsoft technologies and recommend improvements
• Support Microsoft 365‑related projects from design through delivery

Essential:

• 8+ years’ experience working in a Microsoft enterprise environment
• Strong hands‑on expertise with Microsoft 365
  , including:
• Intune
• Exchange Online
• SharePoint Online
• Microsoft Teams
• Proven experience leading M365 migrations and optimisations
• Advanced Power Shell scripting and automation skills
• Strong understanding of identity, security, compliance, and modern architectures
• Excellent problem‑solving and troubleshooting capability
• Confident communicator, able to explain technical concepts clearly
• Experience mentoring or leading other technical team members

Desirable:

• Microsoft certifications (e.g.
  Enterprise Administrator Expert
  , Modern Desktop Administrator
  )
• Experience working in regulated or ISO‑aligned environments

• Senior, influential role with real ownership
• Technically complex Microsoft 365 estate
• Collaborative, professional IT environment
• Opportunity to shape standards, processes, and future direction
• Mix of strategic work and hands‑on technical delivery

Apply directly via Linked In or reach out for a confidential discussion.

Planet Pharma is an equal opportunities Recruitment Business and Agency. We welcome applications from all suitably qualified candidates regardless of their race, sex, disability, religion/belief, sexual orientation, or age.