About this role
Salary: £38,000 - 42,000 per year
Requirements
- Proven experience as a Senior IT Technician, IT Field Engineer, Infrastructure Engineer, Network Engineer, or similar.
- Strong hands-on experience installing, configuring, and troubleshooting business IT networks.
- Excellent knowledge of managed switches, including Layer 2/3 switching, VLANs, routing, and network segmentation.
- Practical experience configuring business-grade firewalls, security policies, NAT, and VPNs.
- Experience installing and troubleshooting business wireless networks and access points.
- Good working knowledge of Windows Server, Active Directory, Group Policy, DNS, DHCP, and Hyper-V.
- Experience diagnosing and resolving complex infrastructure and networking issues.
- Confidence providing 3rd line technical support and managing escalated incidents.
- Strong communication and customer service skills, including the ability to explain technical issues clearly.
- A proactive, organised approach and the ability to work independently and as part of a team.
- Based within a reasonable commuting distance of Barnsley (S75), as the role is predominantly office-based.
- Full UK driving licence.
- Managed Service Provider (MSP) experience is beneficial but not essential.
- Experience with WatchGuard firewalls; HP/Aruba, Cisco, or Ubiquiti networking equipment; Microsoft Azure and hybrid infrastructure; Microsoft 365 administration and migrations; cyber security platforms such as ThreatLocker or Huntress; ConnectWise Manage/Asio; or ITIL, Microsoft, Cisco CCNA, or CompTIA certifications would be advantageous.
- Experience working across different networking vendors and customer environments is welcome.
Responsibilities
- Install, configure, and maintain IT networks and infrastructure at customer sites.
- Deploy and troubleshoot managed switches, firewalls, routers, and wireless networks.
- Configure VLANs, VPNs, routing, switching, DHCP, DNS, and IP addressing.
- Install and support Windows Server, Active Directory, and Hyper-V environments.
- Deliver network upgrades, server migrations, firewall replacements, and infrastructure projects.
- Provide 3rd line technical support, investigating and resolving complex customer issues.
- Act as an escalation point for 1st and 2nd line technicians, providing technical guidance and support.
- Carry out network assessments, site surveys, and infrastructure health checks.
- Diagnose connectivity, performance, and security issues remotely and on-site.
- Maintain accurate technical documentation, configuration records, and service tickets.
- Work with customers and colleagues to manage projects and technical issues effectively.
Technologies
- Active Directory
- Aruba
- Azure
- Cloud
- Cisco
- Firewall
- Hyper-V
- Support
- ITIL
- Microsoft 365
- NAT
- Network
- Security
- Windows
- Office 365
- DevOps
More
We are seeking a Senior IT Infrastructure Engineer to join our growing technical team in Barnsley, South Yorkshire (S75). The role is predominantly office-based, with occasional customer site visits, and combines advanced 3rd line support with hands-on field engineering. We offer a salary of £38,000–£42,000 per annum, a varied role across customer networks and technologies, opportunities to work on infrastructure installations, upgrades, and technical projects, and scope to develop expertise in networking, infrastructure, cyber security, and cloud technologies. Youll join a supportive, experienced team where your knowledge and contribution will be valued.
last updated 46 week of 2026