Senior Network Infrastructure Engineer Hybrid Working 2 days on site a week Our client, a large and forward-thinking organisation is urgently seeking a Senior Network Infrastructure Engineer to join their Head Office team in Hertfordshire. This is an exciting opportunity for an experienced and motivated engineer with a solid background in network design, multi-site infrastructure, and on-premises and hybrid environments. The Role As a Senior Network Infrastructure Engineer, you will play a pivotal role in designing, maintaining, and evolving the organisation''s network and infrastructure, supporting a multi-office WAN environment. You''ll be responsible for: Designing, implementing, and optimising network infrastructure across multiple sites Managing and maintaining Routers, Switches, Firewalls, and SAN storage Leading and contributing to the transition to enterprise-grade network solutions (Juniper, Cisco, or Fortinet Supporting Windows Server, Active Directory, and VMware environments Ensuring reliability, performance, and scalability across all network and server systems Working across on-premises, Azure, and Microsoft 365 hybrid environments Essential Skills andamp; Experience Strong background in network design and infrastructure management Experience with WAN/LAN environments and multi-office connectivity Hands-on experience with Firewalls, Switches, Routers, and SAN technologies Working knowledge of Windows Server, Active Directory, and VMware Ex