Senior IT Support and Infrastructure Engineer Jobs

MTM Pet Care (LECVNG)

Location:
United Kingdom, Norwich or Cambridge

Category:
IT - Administration

Contract Type:
Not provided

Salary:

37000.00 - 45000.00 GBP / Year

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Job Description:

The Senior IT Support and Infrastructure Engineer will comprehensively assess our IT infrastructure, covering on-premises networks, virtual environments, Active Directory, Azure integration, and firewall configuration. Recommendations will be provided for issues identified, along with supply time/cost proposals. Required remedial action will be taken and implemented as appropriate.

Job Responsibility:

Take ownership of diagnosing and resolving issues with existing LAN and WAN infrastructure
Improve performance, security, and manageability across switching, routing, VLANs, DHCP, and DNS
Support physical cabling and server room reorganisation in preparation for infrastructure migration to Norwich
Ensure reliable and consistent network access across all organisational sites
Manage and monitor the Hyper-V environment, including provisioning, performance tuning, and troubleshooting
Assist in migration of services from legacy infrastructure to modern Hyper-V platforms
Maintain strong operational standards for patching, backups, and capacity management
Maintain and improve on-premises Active Directory and Group Policy structure
Assist with planning and implementation of a clean domain rebuild using industry best practices
Support Azure AD hybrid identity infrastructure, including AAD Connect, SSO, and conditional access
Administer and support Microsoft 365 services, including Exchange Online, SharePoint, OneDrive, Teams, and Intune
Maintain and optimise the organisation’s Azure AD hybrid environment
Ensure secure and reliable integration between cloud and on-prem infrastructure
Support AAD Connect, conditional access policies, and device management
Administer Fortinet (FortiGate) firewalls across all sites and virtual networks
Maintain and update firewall rules, VPNs, NAT policies, and segmentation
Verify alignment between firewall configurations, infrastructure layout, and security policies
Collaborate with audit and compliance teams to remediate vulnerabilities and improve system hardening
Respond to and resolve escalated infrastructure issues in collaboration with 1st/2nd line support
Maintain up-to-date technical documentation, diagrams, and standard operating procedures
Participate in infrastructure improvement initiatives and support IT-related audits and compliance work

Requirements:

Minimum 4–5 years’ experience in a senior infrastructure or IT support role
Strong hands-on experience with Microsoft environments: Windows Server, Active Directory, Office 365
Experience managing Azure AD and hybrid identity environments
Proven ability to take ownership of infrastructure issues and implement effective solutions
Deep understanding of TCP/IP, DNS, DHCP, VLANs, routing, and troubleshooting tools
Advanced knowledge of Active Directory, Group Policy, and Office 365 administration
Hands-on experience with Azure AD, AAD Connect, conditional access, and Intune/Defender for Endpoint
Strong FortiGate firewall configuration and support skills (including VPN and segmentation)
Excellent diagnostic and problem-solving abilities across systems and networks
Clear communication skills, both written and verbal, across technical and non-technical teams
Own transport is essential due to multi-site responsibilities (infrequent)
Willingness to travel between sites and provide support outside normal hours if required (infrequent)

Nice to have:

Certifications such as Microsoft (MCSA/MCSE/Azure), Fortinet NSE, CompTIA, or similar
Experience working in an MSP or multi-site environment
Experience mentoring staff or leading small infrastructure initiatives
Experience automating tasks with PowerShell or other scripting tools
Familiarity with Cyber Essentials Plus or equivalent security standards

Additional Information:

Job Posted:
December 10, 2025

Employment Type:

Fulltime

Work Type:

On-site work

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Senior IT Support and Infrastructure Engineer