IT Systems & Network Administrator in England

Job Description

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- SonicWall firewalls - configuration, VPNs, security policies & troubleshooting
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- VMware ESXi / vSphere - administration, provisioning, backups & performance
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- Windows Server & Active Directory
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IT Systems & Network Administrator Location: Heathrow
Salary: £50,000 – £80,000 depending on experience
Working arrangement: Office/depot based – not a remote role

/n Our client is looking for an experienced and hands-on IT Systems & Network Administrator to join their IT team. This is a key role responsible for the day-to-day operation, maintenance, security and troubleshooting of the organisation's IT infrastructure.
/n The successful candidate will have strong practical experience across network administration, firewall management and virtualisation, with particular expertise in SonicWall firewalls and VMware ESXi/vSphere.

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Proven, demonstrable experience in a similar IT systems/network administration role is essential.

/n The Role You will be responsible for:
Network Security & Firewall Management

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- Configure, manage and maintain SonicWall firewalls, including security policies, access rules, NAT, VPN and content filtering.
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- Monitor firewall logs and network traffic to identify and respond to potential security threats.
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- Carry out firmware upgrades, configuration backups and security hardening.
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- Troubleshoot network connectivity and security issues.
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Virtualisation & Server Administration

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- Administer and maintain VMware ESXi/vSphere hosts and virtual machines.
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- Provision virtual machines and manage resource allocation and performance.
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- Manage snapshots, backups, migrations and capacity planning.
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- Monitor the health, availability and performance of the virtual infrastructure.
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- Support patching and ongoing infrastructure improvements.
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End-User Support

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- Provide 1st and 2nd line technical support to users across hardware, software, network and connectivity issues.
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- Investigate and resolve support tickets efficiently and professionally.
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- Provide a high level of customer service to internal users.
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- Document incidents, solutions and standard operating procedures.
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General IT Operations

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- Support Windows Server, Active Directory and associated services.
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- Assist with backup, disaster recovery and business continuity processes.
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- Work with external IT vendors and service providers to resolve technical issues.
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- Support IT procurement and infrastructure projects where required.
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About You We are looking for someone with:

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- At least 5 years' experience in an IT Systems, Network Administration or similar infrastructure-focused role.
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- Proven, hands-on experience managing SonicWall firewalls, including configuration, VPNs, policies and troubleshooting.
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- Strong working knowledge of VMware ESXi / vSphere.
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- Excellent troubleshooting skills across desktop, server and network environments.
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- Experience with Windows Server and Active Directory.
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- A proactive approach to identifying and resolving technical issues.
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- Strong problem-solving skills and the ability to take ownership of issues through to resolution.
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- Excellent communication skills and a customer-focused approach.
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- The ability to work independently, prioritise workload and operate effectively in a busy environment.
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Desirable Experience The following would be advantageous:

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- Relevant IT certifications such as SonicWall CSSA, VMware VCP, CompTIA Network+/Security+ or Microsoft certifications.
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- Experience supporting multi-site or international environments.
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- Knowledge of PowerShell or other scripting.
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- Experience with IT infrastructure monitoring tools.
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- Previous experience working within a busy operational or depot-based environment.
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Salary & Working Arrangements The salary will be dependent on experience:

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- Intermediate-level candidate: up to £50,000
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- Highly experienced candidate: up to £80,000
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This is a fully office/depot-based position at Heathrow, and the role does not offer remote working.

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If you are an experienced IT Systems or Network Administrator looking for a hands-on infrastructure role where your technical expertise will be highly valued, we would be keen to hear from you.