Network Infrastructure Specialist

Adecco Portugal; Dundee; On-site; GBP 45,000 - 65,000; Full time

Job summary

A network infrastructure engineering specialist is sought to join the client’s IT team in the UK. The role is hands‑on, maintaining and developing network and infrastructure across multiple sites, ensuring security, reliability and performance.

You will deploy and manage LAN/WAN, VPN, SD‑WAN and Wi‑Fi, configure switches/routers/firewalls, and administer VMware, Microsoft 365 and Azure. Travel to sites and occasional out‑of‑hours work are required.

Qualifications

• Experience in a network infrastructure or systems role.
• Strong knowledge of LAN/WAN, VPNs and Wi‑Fi technologies.
• Experience configuring and securing switches, routers and firewalls.
• VMware virtualization experience.
• Microsoft 365 and Azure administration experience.
• Windows Server environments including Active Directory, DNS and DHCP.
• Network monitoring and troubleshooting experience.
• IT service management and ticketing tools.
• Knowledge of IT security and cybersecurity principles.
• Backup and disaster recovery experience.
• Excellent problem‑solving and analytical skills.
• Strong communication, and ability to explain technical concepts to non‑technical users.

Responsibilities

• Deploy, configure and maintain LAN/WAN connectivity including SD‑WAN, VPN and Wi‑Fi.
• Configure, monitor and support switches, routers, firewalls, servers and apps.
• Administer VMware environments and Microsoft 365/Azure.
• Monitor performance, diagnose issues and implement fixes.
• Maintain security with patches, firmware updates and best practices.
• Manage backup and disaster recovery to minimise downtime.
• Support IT infrastructure projects from design through implementation.
• Escalate complex issues and provide advanced troubleshooting.
• Maintain accurate network diagrams, configurations and procedures.
• Follow change management and IT best practices.
• Travel to multiple sites as required.
• Build strong relationships with stakeholders and suppliers.
• Participate in limited on‑call rota (Saturday mornings) and occasional out‑of‑hours work.

Skills

LAN/WAN networks

VPNs

Wi‑Fi technologies

Switches/routers/firewalls

VMware

Microsoft 365 & Azure

Windows Server (AD, DNS, DHCP)

Network monitoring & troubleshooting

IT service management & ticketing

Cybersecurity basics

Strong communicator

Education

Relevant IT degree or professional qualification

Cisco CCNA or equivalent (desirable)

Experience with SD-WAN (desirable)

Tools

VMware

Microsoft 365

Azure

Job description

We are seeking an experienced Network Infrastructure Engineering Specialist to join our clients growing IT team. This is a hands‑on role responsible for maintaining and developing network and infrastructure systems across multiple sites. You'll play a key role in ensuring business‑critical systems remain secure, reliable and high‑performing while providing expert support and technical guidance.

Key Responsibilities

• Deploy, configure and maintain network connectivity including LAN, WAN, SD‑WAN, VPN and Wi‑Fi environments.
• Configure, monitor and support network infrastructure including switches, routers, firewalls, servers and business applications.
• Administer VMware virtual environments alongside Microsoft 365 and Azure cloud services.
• Monitor network performance, diagnose issues and implement effective solutions.
• Maintain network security through patch management, firmware updates and cybersecurity best practices.
• Manage backup and disaster recovery processes to minimise downtime.
• Support and deliver IT infrastructure projects from design through to implementation.
• Act as an escalation point for complex technical support issues and advanced troubleshooting.
• Maintain accurate technical documentation including network diagrams, configurations and procedures.
• Follow change management processes and IT best practices.
• Travel to multiple sites as required.
• Build strong working relationships with internal stakeholders and external suppliers.
• Participate in a limited on‑call rota (Saturday mornings) and occasional out‑of‑hours maintenance activities.

Essential Skills & Experience

• Experience in a similar Network Infrastructure or Systems role.
• Strong knowledge of LAN/WAN networks, VPNs and Wi‑Fi technologies.
• Experience configuring and securing switches, routers and firewalls.
• VMware virtualisation experience.
• Microsoft 365 and Azure administration experience.
• Strong knowledge of Windows Server environments including Active Directory, Group Policy, DNS and DHCP.
• Network monitoring and troubleshooting experience.
• Experience using IT service management and ticketing tools.
• Sound understanding of IT security and cybersecurity principles.
• Experience with backup and disaster recovery solutions.
• Excellent problem‑solving and analytical skills.
• Strong communication skills with the ability to explain technical concepts to non‑technical users.
• Ability to work independently and as part of a team.
• Full UK Driving Licence.

Desirable Skills

• Relevant IT degree, certification or professional qualification.
• Cisco certification (CCNA or equivalent).
• Experience with SD‑WAN technologies.
• Linux administration experience.
• Knowledge of Power Automate, Power BI and SharePoint.
• Scripting experience (PowerShell, Visual Basic or similar).
• Experience carrying out physical installations including cabling and equipment mounting.
• Interest in researching and implementing new technologies and solutions.

The Adecco Group UK & Ireland is an Equal Opportunities Employer.