Senior Infrastructure Engineer

- Design, implement, and support secure, scalable network solutions across multi-site customer environments. - Lead the delivery of network and core infrastructure projects, including new installations, upgrades, and migrations. - Manage and maintain on-prem and cloud infrastructure, ensuring high availability, performance, and security. - Provide senior-level support for routing, switching, firewalls, VPNs, and WAN connectivity. - Administer and support Windows Server environments, virtualised platforms (Hyper-V), and associated services. - Support and optimise Microsoft cloud technologies, including Azure, Azure AD, Office 365, and Intune. - Monitor infrastructure performance, capacity, and security; proactively identify risks and improvement opportunities. - Implement and maintain security policies, patching, firmware updates, and disaster recovery solutions. - Act as an escalation point for complex technical issues, providing remote and on-site support where required. - Produce and maintain high-quality technical documentation, including network diagrams, configurations, and procedures. - Work closely with senior management and other technical teams to define standards, policies, and best practices. - Provide technical guidance, mentoring, and oversight to junior engineers and field teams.