About the Role
PURPOSE:
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.
MAIN DUTIES AND RESPONSIBILITIES:
1. Network and WAN Operations
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.
2. Virtual Infrastructure and Servers
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.
3. Active Directory and Identity
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.
4. Azure and O365 Hybrid Environment
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.
5. Firewall and Security
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.
6. General Infrastructure Support
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.
QUALIFICATIONS AND CERTIFICATIONS
Required:
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.
Desirable:
Certifications such as Microsoft (MCSA/MCSE/Azure), Fortinet NSE, CompTIA, or similar.
Experience working in an MSP or multi-site environment.
EXPERIENCE AND SKILLS
Essential:
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.
Desirable:
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.
OTHER REQUIREMENTS
Own transport is essential due to multi-site responsibilities (infrequent).
Willingness to travel between sites and provide support outside normal hours if required (infrequent).
Pay Range
£37,000 - £45,000 dependent on the experience.