IT Systems & Network Administrator
Location: Heathrow
Salary: £50,000 £80,000 depending on experience
Working arrangement: Office/depot based not a remote role
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.
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.
Proven, demonstrable experience in a similar IT systems/network administration role is essential.
The Role You will be responsible for:
Network Security & Firewall Management
- Configure, manage and maintain SonicWall firewalls , including security policies, access rules, NAT, VPN and content filtering.
- Monitor firewall logs and network traffic to identify and respond to potential security threats.
- Carry out firmware upgrades, configuration backups and security hardening.
- Troubleshoot network connectivity and security issues.
Virtualisation & Server Administration
- Administer and maintain VMware ESXi/vSphere hosts and virtual machines.
- Provision virtual machines and manage resource allocation and performance.
- Manage snapshots, backups, migrations and capacity planning.
- Monitor the health, availability and performance of the virtual infrastructure.
- Support patching and ongoing infrastructure improvements.
End-User Support
- Provide 1st and 2nd line technical support to users across hardware, software, network and connectivity issues.
- Investigate and resolve support tickets efficiently and professionally.
- Provide a high level of customer service to internal users.
- Document incidents, solutions and standard operating procedures.
General IT Operations
- Support Windows Server, Active Directory and associated services.
- Assist with backup, disaster recovery and business continuity processes.
- Work with external IT vendors and service providers to resolve technical issues.
- Support IT procurement and infrastructure projects where required.
About You
We are looking for someone with:
- At least 5 years' experience in an IT Systems, Network Administration or similar infrastructure-focused role.
- Proven, hands‑on experience managing SonicWall firewalls , including configuration, VPNs, policies and troubleshooting.
- Strong working knowledge of VMware ESXi / vSphere .
- Excellent troubleshooting skills across desktop, server and network environments.
- Experience with Windows Server and Active Directory .
- A proactive approach to identifying and resolving technical issues.
- Strong problem‑solving skills and the ability to take ownership of issues through to resolution.
- Excellent communication skills and a customer-focused approach.
- The ability to work independently, prioritise workload and operate effectively in a busy environment.
Desirable Experience
The following would be advantageous:
- Relevant IT certifications such as SonicWall CSSA, VMware VCP, CompTIA Network+/Security+ or Microsoft certifications .
- Experience supporting multi-site or international environments .
- Knowledge of PowerShell or other scripting .
- Experience with IT infrastructure monitoring tools.
- Previous experience working within a busy operational or depot-based environment.
Salary & Working Arrangements
The salary will be dependent on experience:
- Intermediate-level candidate: up to £50,000
- Highly experienced candidate: up to £80,000
This is a fully office/depot-based position at Heathrow, and the role does not offer remote working.
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