Network/Network Security Engineer- City of London

Network/Network Security Engineer required for predominantly BAU work in a 2nd/3rd

line support capacity; a high availability financial services environment, typically the work will

involve: Firewall Rule creation, Network Trouble- Shooting, detailed design, Packet Tracing etc.

Good general IT infrastructure knowledge/experience required including Windows 10

and knowledge of Cisco IPT/UC: CUCM, Cisco Unity, UCCX, and SIP would be really useful.

Skills/experience required

  • Firewall Rule creation
  • Network Design (LLD)
  • Packet Tracing
  • General Network Troubleshooting
  • TCP/IP
  • SPI, IPS/IDS, ACLs, IPsec
  • Network Management tools
  • Cisco ASA
  • Netscreen
  • Juniper
  • Windows 10/Skype for Business Online/Teams

Nice to have

  • Experience with IPT (specifically Cisco): CUCM, Cisco Unity, SIP, UCCX
  • Experience with Video Conferencing (QoS, Static Routes, Outbound/Inbound traffic flows)

You will have a proven track record of providing 2nd /3rd line operational support and administration of local and remote network estate and demonstrable experience of implementing client network and security configurations from LLD (Low Level Designs).   

As a member of the Network Team, the primary function of the role will be supporting Cisco networks and Cisco security solutions to ensure internal Corporate, Data Centre, Acquirer and Customer networks and services are managed and maintained to a high standard.

The individual will work with other members of the Infrastructure team, Client Support,

Development, Test Teams, Project Management, Sales and the Infrastructure Security

Engineer to understand.

The Network Infrastructure Engineer role will involve but not be limited to:

Providing 2nd/ 3rd line operational support and administration of the company’s

              Local and remote network estate.

Implementation of client network and security configurations working from LLDs (low

              Level designs).

Ownership, diagnosis and resolution of network faults and problems in both

              hardware and software.

Liaise with the Service Desk with regards to client affecting network problems

              Including regular updates, status of resolution and provide documentation

              where required, including network diagrams.

Maintaining and advising network security to internal departments and clients.

Ensuring internal and client SLAs are met.

Functional Accountabilities:

Process  –  Be  responsible  for  developing  and  implementing  the  processes  and

procedures necessary to build a world class network service.

Serious  Incident  Management  –  Assist  where  required  with  the  resolution  of

serious service incidents. Able to troubleshoot and resolve issues .

Event  Management  –  take  ownership  and  manage  the  resolution  of  service


Change Management – Ensure all network changes follow the formalised

Change management process.  Ensure changes are validated and technically

Approved prior to release.

Availability Management – Where directed take ownership of service availability

to optimise the capability of the network infrastructure to deliver cost effective

and sustained levels of availability which exceed our client SLAs.

Capacity Management – Where directed take ownership of capacity

management  to  ensure  the  networks  are  monitored  proactively  to  ensure

Agreed capacity levels.

Problem Management – Assist the Problem Management team with major

Problem resolution where problems are adversely affecting service performance

And delivery to clients on an ongoing basis. Minimise the adverse effect on the

Managed Service of Incidents and Problems caused by errors in the network and

Proactively prevent the occurrence of Incidents, Problems and errors.   Liaise

with  all  support  staff,  senior  managers  and  the  Service  Managers,  escalating

where necessary, to ensure that our response exceeds client expectations.

Service Maintenance Management – Manage scheduled network maintenance

in  liaison  with  the  Service  Managers  to  ensure  that scheduled  maintenance  is

planned fully in advance. (Scheduled maintenance must be agreed in advance

with clients in line with the company’s contractual obligations).

Network Infrastructure – Take ownership of the Group’s network infrastructure.

Security – Demonstrate a clear understanding of the Group’s Information

Security Policy and be conscious of security at all times. Respond appropriately

To any breach in security or security risk. Ensure that security patches are tested

And applied to the services.  In relation to the network infrastructure, and in

Association with the Information Security Officer, recommend and implement

Changes in security policies and practices

Assist  with  managing  the  administration  of  all  computer  security  systems  and

Their corresponding or associated software, including firewalls, intrusion

Detection systems, cryptography systems, and anti-virus software.

Reporting – Take ownership of reports to measure defined KPIs relating to the

Network performance from MPLS providers.

Documentation – Produce clear and concise network documentation showing

All connectivity that enables simple incident and problem resolution. Document

and  maintain  the  written  procedures  for  security  patching,  network

Infrastructure patching, system upgrades etc.

Service Improvement – Research, formulate and recommend plans for network

Development including infrastructure expansion, security provision, service

Reporting and monitoring.

Technology refresh – Stay abreast of technological developments in the service

Industry and formulate plans for refresh of our network infrastructure, network

Monitoring etc.


Relevant on the job networking experience.

Demonstrable knowledge of network concepts, IP addressing / sub-netting, the

OSI model, firewalls, router and switches.

Experience providing operational technical support to critical systems supporting

major blue-chip customers in a 24 x 7 managed services / data centre

Environment working with relevant technologies and within an ITIL framework.

Excellent customer skills for direct interaction with internal and external teams.

Dedicated willingness to learn and the ability to continuously improve processes

/ Documentation.

Type of position: Contract

Contract length: 4/6 months

Location: City of London

Rates: £350 to £450 per day

Reference: 181020191506

Contact: Anne Rowan: or 0203 1433311