Share this Job

Network Engineer

Date: 22-Jun-2019

Location: LONDON, GB

Company: Telefónica S.A.

O2 is the commercial brand of Telefonica UK Limited, a leading digital communications company owned by Telefonica S.A.  With over 25 million customers across the UK, O2 is one of the world’s most innovative companies putting our customers at the heart of everything we do.


We are more than just a network.  We open up the endless possibilities of technology, connecting our customers to the things that they love and exploring new ways to open up the world for them. 


We are always on the lookout for great talent.  Just like our customers, we offer our employees more.  From a choice of benefits, rewards, training and ongoing career development there are many reasons to join O2.

About the team

The core network team are responsible for design and implementation on the enterprise and wifi core network. They ensure network availability and capacity and work closely with suppliers to ensure best practices are followed.


About your role

You will be a key member of the team, with responsibility for the ensuring the core network is designed and implemented to best practise and to ensure that customer experience is at the forefront of all work completed.


Key responsbilities

  • Subject Matter Expert in all aspects of routing and switching
  • Participate in network audits and address any deficiencies
  • Lead projects from beginning through to completion
  • Act as a mentor for other team members
  • Engage with key stakeholders - Mainly,  senior management and external suppliers


Key skills and experience


  • Deep understanding and experience implementing routing protocols such as BGP, EIGRP, ISIS, DMVPN, IPSEC and MPLS (Including LDP and RSVP)
  • Deep understanding and experience implementing switching protocols such as HSRP, STP and trunking
  • At least 7 years ISP experience working for a service provider deploying Cisco and Juniper equipment at CCNP level or above


  • Desirable – WLC, Load Balancer, Firewall Experience in a large enterprise or carrier network.


Joining Telefonica means opening up a world of freedom, support and possibility. A fascinating world where you’ll be able to think bigger, be bolder and try new things. And where there are endless opportunities to develop your career. 

There’s so much to discover. Your adventure starts here.