IT Systems & Network Administrator

• SonicWall firewalls - configuration, VPNs, security policies & troubleshooting
• VMware ESXi / vSphere - administration, provisioning, backups & performance
• Windows Server & Active Directory

IT Systems & Network AdministratorLocation: 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-onIT 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 acrossnetwork administration, firewall management and virtualisation, with particular expertise inSonicWall 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 maintainSonicWall 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 maintainVMware 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

• Provide1st 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

• SupportWindows 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 managingSonicWall firewalls, including configuration, VPNs, policies and troubleshooting.
• Strong working knowledge ofVMware ESXi / vSphere.
• Excellent troubleshooting skills across desktop, server and network environments.
• Experience withWindows 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 asSonicWall CSSA, VMware VCP, CompTIA Network+/Security+ or Microsoft certifications.
• Experience supportingmulti-site or international environments.
• Knowledge ofPowerShell 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 afully office/depot-based position at Heathrow, and the role does not offer remote working.

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.