Senior IT Infrastructure Systems Engineer

**Main responsibilities** * Design, build, and support corporate networks, servers, storage, telephony, and systems * Implement secure, fault-tolerant infrastructure solutions * Provide technical leadership and architectural direction across multiple teams * Act as an internal escalation point for complex infrastructure issues * Plan and execute projects across the infrastructure landscape * Lead and participate in infrastructure, systems, and application projects * Migrate systems from on‑premise to co‑location and cloud environments * Mentor less senior staff * Manage vendors for hardware, software, and service troubleshooting * Help define and execute enterprise-wide infrastructure strategy * Develop solutions supporting international expansion **Requirements** **Technical Requirements** * 8+ years of hands-on experience with **enterprise LAN/WAN, servers, and storage** * Strong experience with **routing, switching, firewalls, wireless infrastructure** (physical & virtual) * Hands-on experience with **VMware ESXi, vSphere, and vCenter** * Experience administering **Okta SSO / MFA** * Extensive experience with **Microsoft Server OS and Active Directory** * Cloud experience with **AWS and Azure** (cloud-first approach) * Disaster recovery and business continuity design experience * Microsoft collaboration stack: **O365, Teams, SharePoint, OneDrive** * Strong **scripting** skills * Patch deployment experience * Network and systems monitoring experience (plus) * **Splunk** experience (plus) * ITIL experience (plus) * Linux experience (plus) * **Cisco Meraki** experience (plus **Education & Certifications** * Minimum AA degree in Information Systems or equivalent experience * Cisco certification (plus) * O365 certifications (plus) * AWS certifications (plus) * Windows certifications (plus) Find more [English Speaking Jobs in United Kingdom](https://www.arbeitnow.co.uk/english-speaking-jobs) on Arbeitnow