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.