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IP Test Engineer

Date: 29-Aug-2021

Location: SLOUGH, GB

Company: Telefonica S.A.

Location: Slough

Closing date: 20/09/2021


It matters to us that Team O2 is as diverse as the communities we serve.


We’re aware that we need more diversity in our senior leadership roles, so we welcome and encourage people from all backgrounds to apply.


Whoever you are, O2 has a place for you.

Come join us


About the team:



Transport Test are part of Telefónica UK Networks, and are responsible for the testing of all: IP, Transport & Network Management System changes ensuring our customers receive the best quality of service with minimal impact.


We test and Integrate innovative and class leading solutions utilising some of the latest and most exciting IP, transmission and transport technologies.


About the role:


The role requires specialized depth of expertise in IP testing and problem solving with excellent analytical / troubleshooting skills of complex problems encompassing an in depth knowledge of:


  • Juniper / Cisco / Alcatel IP equipment.

  • Ability to analyse detailed technical documentation in order to derive Test Strategy and write associated Test Plans and Test Criteria’s that match the scope and level of risk agreed with our customers.

  • Ability to produce Risk assessments based on the test cycle experience and clearly document and summarise the key factors.

  • You must be able to Work independently receiving minimal guidance & direction and It may be necessary to manage Upgrades which could involve testing outside normal hours.


Key responsibilities:



The main functions of this role are split between: IP test activities and support, IP project management and IP planning.


The IP project management / planning activity is to ensure TUK IP team delivers on TUK test requirements taking on internal or external business issues and recommending best practice. The role requires action as a resource for colleagues with less experience and may direct the work of other team members / contractors.


The support role requires you to take proactive responsibility of issues and solving complex problems in and around the Test Environments and demonstrate tenacity to see them to resolution, thus supporting and guiding Telefónica UK projects under test in accordance with project milestones.


IP testing within the Testbed environment involves defining appropriate test strategies ensuring all risks are assessed. 


Testing upgrade / changes on network equipment, liaising relationships; influences stakeholders with internal Telefónica UK departments and raising problems with the Vendor and progressing them to a satisfactory conclusion. This is carried out whilst communicating progress, results and technical issues to the Project team, Vendors and customers.


Key Skills:


  • Understanding of Project Management methodologies with excellent Verbal and Written Communication skills.
  • An excellent Team Player comfortable in leading and following team mates where opportunity calls and have test and integration experience in a Mobile Network IP environment.
  • Must have an ability to work independently and acts as a resource for colleagues directing their work if necessary.
  • Knowledge of Spirent Test Centre, IXIA and Wireshark or similar IP packet generation and tracing tooling are key skill required for this role with an ability to assess issues and provide impact analysis.




  • Minimum of Cisco CCNA accredited or equivalent with good knowledge of GSM, GPRS, UMTS and LTE principles.
  • Knowledge of Spirent Test Centre, IXIA and Wireshark or similar IP packet generation and tracing tooling and an understanding of Testing Methodologies.
  • In depth knowledge and experience with Cisco, Juniper and Alcatel Routers, Ethernet Switches, IP protocols, LAN, WAN, MAN & SAN networks, MPLS/VPN & IP Security/VPN technologies.




  • Good knowledge of IT system administration on Microsoft and Unix/Linux systems and PDH / SDH, ATM, Frame Relay systems.
  • ISTQB (ISEB) Foundation qualified.




We’re looking to pay a competitive salary (depending on experience) for this position. We also offer plenty of extras to sweeten the deal, which could include things like bonuses, life assurance cover, health care and lots of flexible benefits.


We also believe a great work-life balance is important, so we’re open to considering part-time and flexible approaches to working. Like to know more, feel free to raise it.


Please note:

• If you have any questions around the role then please email who will be happy to help

• Due to the potential conflict of interest, unfortunately we’re unable to facilitate secondments to or from Tesco Mobile

• Remember – you must notify your line manager whenever you apply for a new role, and if you are applying for a secondment, please take a look at the secondment policy available via the intranet