Senior Infrastructure Engineer

Role: Senior Infrastructure Engineer Location: Abingdon, Oxfordshire Salary: Up to £55,000 + performance-related bonus Type: On-site, Permanent

Join a well-established IT solutions provider with over 30 years' experience supporting 400+ client sites nationwide. We're looking for a customer-focused Senior IT Engineer with strong networking expertise to join the growing team.

The Role

You'll lead and support networking projects, manage infrastructure, and provide remote and on-site support. You'll work closely with customers and internal teams to deliver secure, scalable, and high-quality IT solutions.

Key Responsibilities

• 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.

Key Skills & Experience

• 4-5 years in a similar senior IT/networking role
• Cisco routers & switches
• TCP/IP networking, firewalls (Fortinet), and IT security
• Windows Server (2016/2019/2022), Hyper-V
• Active Directory & Azure AD
• Microsoft Azure, Office 365, Intune
• Windows 10/11 & Apple device support (MDM/Meraki)
• Backup & disaster recovery solutions
• Strong communication and customer-facing skills
• SQL Server experience beneficial

What We Offer

• Company Car
• Company pension
• Private healthcare & group life cover
• Flexible working schedule
• Employee discounts
• Profit-share eligibility after 12 months