Senior Microsoft 365 Administrator

Senior Microsoft 365 AdministratorLocation: Hertfordshire  Benefit package including a bonus, healthcare, pension, pay reviews & other benefits.We’re working with a growing organisation that is looking to recruit a Senior Microsoft 365 Administrator to play a pivotal role in the administration, optimisation, and ongoing evolution of its Microsoft 365 platform within a mature ITIL / ISO-aligned environment. This is an exciting role with career potential with an attractive organisation.This is a senior, hands-on role suited to someone who enjoys acting as a technical authority and trusted advisor (SME), leading complex initiatives like migrations and platform optimisation, while also mentoring juniors and helping shape best practice.You’ll work closely with other teams to ensure Microsoft 365 services are secure, resilient, and aligned to the wider organisational goals.Key Responsibilities

• Leading the administration, management, and optimisation of Microsoft 365 services in line with organisational standards & best practice
• Owning and delivering migrations, updates, and optimisation initiatives, leveraging PowerShell scripting & automation
• Acting as an SME for complex escalations & troubleshooting across the Microsoft 365 estate
• Developing, documenting, and maintaining processes and procedures to drive consistency & efficiency
• Performing patch testing & patch management across end-user devices, ensuring correct governance and change controls are followed
• Mentoring and supporting junior IT team members, fostering skills development and technical maturity
• Collaborating cross-functionally to align Microsoft 365 initiatives with organisational strategy, driving continual improvement
• Monitoring and maintaining security, compliance, and governance across Microsoft 365 services, implementing controls to mitigate risk
• Providing technical leadership and expertise across Microsoft 365-related projects, ensuring successful delivery
• Staying current with emerging Microsoft technologies, proactively identifying opportunities for enhancement and optimisation
• Contributing to knowledge-sharing and training initiatives, ensuring teams are well equipped to support the platform

Skills & Experience Required

• Experience working in Microsoft environments, with a strong focus on Microsoft 365 administration.
• Deep technical expertise across Microsoft 365, including Intune, Exchange Online, SharePoint Online, and Microsoft Teams
• Experience with Azure, PowerShell, MDM, MFA etc.
• Proven experience leading migrations, updates, and optimisation programmes, using PowerShell & automation
• Strong understanding of modern enterprise architecture, identity and access management, and security & compliance principles
• Excellent troubleshooting and problem-solving skills
• Able to operate independently and collaboratively
• Strong communication skills, with the ability to translate complex technical concepts to a wider audience
• Relevant certifications like Microsoft 365 Certified: Enterprise Administrator Expert, Modern Desktop Administrator Associate, or equivalent would be beneficial