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Senior IT Infrastructure & Support Engineer

Job in West Sussex, Sussex, West Sussex, England, UK
Listing for: Holt Engineering
Full Time position
Listed on 2026-01-26
Job specializations:
  • IT/Tech
    IT Support, Cybersecurity, Systems Engineer, Systems Administrator
Salary/Wage Range or Industry Benchmark: 47500 GBP Yearly GBP 47500.00 YEAR
Job Description & How to Apply Below
Position: Senior IT Infrastructure & Support Engineer
Location: West Sussex

Senior IT Infrastructure & Support Engineer
Horsham
£45,000 – £47,500 + Benefits

Are you a hands-on Infrastructure Engineer who enjoys solving complex problems, owning systems end-to-end, and being the go-to technical expert for your team? This Senior IT Infrastructure & Support Engineer role offers the chance to work across on-prem and cloud environments, support business-critical systems (including ERP), and play a key part in strengthening a growing IT function.

The role

As Senior IT Infrastructure & Support Engineer, you will take ownership of core infrastructure services, ensure the reliability and security of the IT estate, and provide high-level support to users across the business. You’ll work closely with the wider IT team on improvements and projects, while also acting as a technical mentor for junior colleagues.

Key responsibilities include:

Providing advanced technical support for infrastructure, applications, and end-user devices
Maintaining and supporting Windows Server, Active Directory, Group Policy, DNS/DHCP, file/print services
Supporting Azure AD, Exchange Online, Office 365 and cloud identity services
Administering and troubleshooting Hyper-V environments, Veeam backups, WSUS, certificate services and endpoint management tools (e.g. Manage Engine)
Contributing to IT security by supporting endpoint protection, email filtering, monitoring and other cybersecurity tools
Identifying opportunities for automation, standardisation and process improvement within IT operations
Acting as a technical mentor to junior team members, sharing knowledge and providing informal training and guidance
Producing clear documentation of solutions, processes and best practices
Taking part in disaster recovery planning, testing and service continuity initiatives

Skills and experience

Essential:

Strong experience in Windows Server environments: AD, Group Policy, DNS/DHCP, file/print
Excellent understanding of Azure AD, Exchange Online, Office 365 and cloud identity
Working knowledge of Hyper-V, Veeam, WSUS, certificate services and endpoint management tools (such as Manage Engine)
Familiarity with security tools and concepts: endpoint protection, email filtering, monitoring/SIEM or extended AV
Good understanding of networking fundamentals: TCP/IP, VLANs, firewalls and general troubleshooting

Desirable:

Experience using collaboration and tracking tools such as Jira and Confluence

Experience with ERP systems (Epicor ideal), including day-to-day support and admin
Position Requirements
10+ Years work experience
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