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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior System Engineer - M365 - **Company:** Hybriddescription At Wanstor - **Location:** London, UK - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Microsoft Windows, Active Directory, Amazon Web Services, Microsoft Antivirus, Microsoft Azure, Microsoft Online Services, Hyper-V, Virtual Private Networks (VPN), Microsoft Software, Windows Servers, SQL Databases, Wide Area Networks, Wireless Networks, Computer Network Technologies, Firewalls (Computer Science), Microsoft InTune, Routing & Switching, Vmware - **Published:** September 18, 2026 - **Apply:** https://www.apply4u.co.uk/jobs/senior-system-engineer-m365/47391176 ## About the Role adoption and infrastructure modernisation projects, including Microsoft 365, Azure and hybrid environments. Ensure customer environments remain secure and aligned with Cyber Essentials best practices. Act as the final technical escalation point for complex infrastructure and support issues. Take ownership of major technical incidents and change requests through to successful completion. Mentor and support Service Desk engineers, helping to develop the wider technical capability of the business. Work collaboratively across Professional Services, Service Delivery and Account Management to deliver outstanding customer outcomes. What You'll Need Extensive hands-on experience across Microsoft technologies, including: Microsoft 365, Azure, Entra ID, Intune, Microsoft Defender, Active Directory, Exchange Online Strong experience working with: Windows Server, Hyper-V, VMware, SQL, AWS, Hybrid infrastructure environments and Backup and Disaster Recovery Solutions. Good understanding of networking technologies: LAN/WAN, VPN, Firewall, Switching and Routing, Wireless networking, Co-location and Hybrid environments Experience of diagnostic information gathering and analytical thinking, the ability to understand the architecture of operations and undertake root cause analysis. The ability to undertake research consulting a range of data sources and critical thinking skills to provide detailed and accurate analysis. An understanding of current security concepts and frameworks relating to cyber essentials and ISO2701 Accurate and effective communication using a variety of techniques including verbal and written work. What You'll Love Generous Time Off: Enjoy 24 days of annual leave, increasing by 1 day each year up to 28 days, plus Bank Holidays. Continuous Learning: Participate in regular lunch and learn sessions with both internal and external speakers. Personal Development: Take advantage of 5 paid days annually to pursue new skills or knowledge. Volunteer Opportunities: Contribute to your community with 2 paid volunteer days each year. Team Spirit: Join a friendly team and engage in various social events organised throughout the year. #J-18808-Ljbffr ## Description delivery, technical consultancy, customer relationship management and technical leadership. You'll work closely with IT and business leaders, helping customers modernise their environments, solve complex technical challenges and get maximum value from their technology investments. As one of our senior technical specialists, you'll also act as the highest level of technical escalation for the Service Desk, mentor junior engineers and play an important role in driving continual improvement across our customers' environments.What You'll Do Deliver infrastructure, cloud and modern workplace projects across a diverse customer base. Design and implement secure, scalable IT solutions that align with customers' business objectives. Build trusted relationships with customers, becoming a strategic technical advisor rather than simply a support engineer. Proactively review customer environments, identifying opportunities to improve performance, resilience, security and user experience. 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