We are seeking a proactive and technically skilled IT Systems Administrator to manage and support our Microsoft 365 environment across three tenants, covering approximately 25 users. This is a hands-on role that combines systems administration, user support, security, and infrastructure improvement. This is a senior level role, incumbent is expected to Improve the environment and lead new initiatives, primarily for M365 environments and take responsibility for organisation-wide infrastructure Responsibilities Administer Microsoft 365 services including Exchange Online, Teams, SharePoint, and Entra ID across multiple tenants. Implement, configure and Manage endpoint devices using Microsoft Intune, including configuration, compliance, and lifecycle planning. Oversee IT asset management: tracking, valuation, depreciation, and upgrade/replacement planning. Handle onboarding and offboarding processes for employees, ensuring smooth IT transitions. Monitor and respond to security threats using Microsoft Defender and Intune; manage malware and attack mitigation. Provide first-line user support and manage the internal IT helpdesk, including reporting and ticket resolution. Maintain and optimise internet and Wi-Fi infrastructure, including Quality of Service (QoS) management. Support special projects and company-wide initiatives involving IT systems or infrastructure. Develop working relationships with external support organisations, agree contracts and support levels. Drive continua