Network Engineer

Job title: Network Engineer
Location: ASK4 HQ, Sheffield  
Reporting to: Network Team Lead
Start date: TBC

Job Purpose:

To work as part of Technology department, responsible for guiding strategic technology decisions, mentoring junior staff and development and maintenance of Ask4’s in-life Network (Core, Edge and WiFi).


  • Responsible for maintaining Ask4's network as part of a team of technical staff

  • Manage ASK4’s Internet number resources through our various LIRs

  • Provide and help maintain highly available and securely managed networks in the regions ASK4 operate in

  • Manage backbone and edge capacity using the data made available from the commercial and provisioning sides of the business to ensure extra capacity is in place prior to needing it

  • Plan and manage peering, transit & content caches (both from a technical and relationship aspect) to ensure there’s enough, high quality external capacity to satisfy customer requirements while controlling costs

  • Technical implementation of network changes on a project basis

  • Be involved with product development across the business, working with other technical and non-technical teams across the business to enhance existing and bring new products to market

  • Keep abreast of interesting new technologies and make the business aware of them where relevant

  • Work within the pre-sales process to deliver solutions for customer’s requirements

  • Create both high and low level designs and also peer review colleague’s HLD/LLDs for a variety of projects

  • Develop automation scripts as required

  • Escalation point for technical problems with the Ask4 network

  • Adherence to Ask4's policies and procedures, including, but not limited to all the relevant Information Security and Health and Safety policies and procedures.

  • Report any health and safety breaches or concerns in order to assist the company in preventing future accidents/incidents.

  • Ensure you carry out your work in an environmentally responsible manner and inline with environmental policies and procedure

Guidance and Authority

  • Seeks and takes advice from technical specialists / Architect / Manager, as appropriate.

Principle accountabilities /  Key results areas

  • Customers first.

  • Projects delivered on time, to specification and within budget.

  • Network availability managed within SLA.

  • Flexibility required.

Skills & Attributes required:

  • Essential

    • Experience managing MPLS based VPNs (L2 and L3)

    • Experience of operating large scale 802.11 wireless networks

    • Linux experience (ideally RHEL based) and an understanding of Linux networking and how packet forwarding operates

    • Excellent understanding of both IPv4 and IPv6

    • Experience of developing scripts (Python)

    • At least an understanding of WDM (wavelength-division multiplexing)

  • Desirable

    • Knowledge of how CDNs work (Google, Netflix, Amazon, Limelight etc.) and how they deliver traffic to eyeball networks

    • Experience with Ekahau Site Survey for both predictive planning and surveying (802.11)

    • Experience of using CGNAT

    • Worked with enterprise firewall equipment in a HA environment e.g. Palo Alto

    • Understanding of how Ansible works with network devices

    • Automation of network devices using Python based tools such as netmiko, NAPALM, TextFSM

    • Linux system administration experience

    • Good understanding of virtualisation & hypervisor platforms, particularly on Linux (KVM)

    • Good understanding of the network based storage

    • Knowledge of git

  • Platforms

    • RHEL/CentOS

    • Arista EOS

    • HPE/H3C Comware 5 & 7

    • Huawei VRP

    • HP ProCurve/Aruba

    • MikroTik RouterOS

    • Ruckus ZoneDirector & SmartZone

    1. Protocols

      • OSPF

      • MP-BGP

      • MPLS

        • LDP

        • RSVP-TE

        • L2VPN

        • L3VPN

      • DNS


Range: £35,000- £45,000

Applications by way of CV with covering email to stating which role you are applying for. The closing date for applications is to be confirmed.

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ASK4 Limited