Network Security Engineer (3rd Line)

£45000 - £55000 per annum + On Call + Benefits
Portsmouth, Hampshire

Joining the Network Team as a Firewall Engineer, this person will be required to assist with the monitoring and maintenance of the Network Infrastructure; encompassing Core Network, WAN, LAN, Firewall Management, VOIP and Wireless across the business. This will require working with the business and 3rd party suppliers to ensure a suitable and effective service.


  • Fault management and rectification across the Infrastructure to agreed SLA / KPI's.
  • Administration tasks across the Infrastructure as required and dictated by Best Practice.
  • Daily responsibility for the monitoring, management and reporting of the following technologies to the agreed performance levels and standards:
  • Core Network - Covering all Data Centre networks.
  • WAN - Manage the Infrastructure to ensure fit for purpose products are utilised. Manage relationship with supplier.
  • LAN - Manage all site installations and infrastructure (switches etc.)
  • Network Security Devices - Firewall infrastructure including configuration, Maintenance and regular administration
  • VOIP - Monitor and maintain all IP Telephony installations
  • Wireless - Internal and Guest Wi-fi infrastructure including configuration, Maintenance and regular administration
  • Operate a centralised Enterprise Systems Management capability.
  • Work with 3rd Party support to perform operational maintenance of network infrastructure.
  • Assist Solutions Architects in design process, providing guidance and best practice.
  • Production of Operational and Technical Documentation to agreed standards.

Key Skills

  • Experienced Networking professional, focused on delivering effective and efficient operational capability.
  • Proven customer liaison skills
  • Cisco CCNA qualification
  • Strong Firewall background (preferably Cisco/Palo Alto/Netscaler)
  • Confident working across a multi-disciplined IT environment, and diverse business
  • Understanding of IT management processes
  • Good technical knowledge and understanding of IT infrastructure environments
  • Toolset skills for all aspects of this role
  • Ability to produce high quality operational and technical reference documentation

The successful candidate will be required to obtain MOD SC Security clearance


  • 25 days holiday + bank holidays
  • Pension
  • Life Assurance
  • Share Scheme
  • Flexible Benefits: Childcare vouchers, Health Care Cash Plan, Bike Scheme etc.
  • Free Parking
  • Free and regular shuttle bus connecting to local bus and train stations and the city centre.
  • Excellent location with shops, coffee shops, restaurants, a florist, hairdressers, beauty salon and nursery.