Coltech Recruitment

Job Title: Senior Network Engineer / Network Data Administrator Location: Warwick, UK Mandatory Skill: Network Data Administration Work Type: Onsite / UK-based (with ad-hoc travel to client sites) Job Overview We are seeking an experienced Senior Network Engineer to support a major UK infrastructure modernisation programme. The role focuses on enhancing network reliability, security, and user experience across a large-scale enterprise environment. This initiative involves upgrading end-of-life network hardware, deploying advanced Wi-Fi solutions, and delivering high-speed connectivity services integrated with Cisco SD-WAN technologies. The programme also includes exploration and implementation of alternative connectivity solutions such as satellite and 5G technologies to support disaster recovery, rapid deployment, and enterprise expansion initiatives. A significant part of the role will involve conducting on-site wireless surveys and network design activities using tools such as Ekahau. Key Responsibilities Lead and support the modernisation of enterprise UK network infrastructure. Design, implement, and optimise Wireless LAN solutions across large-scale environments. Conduct physical and desktop Wi-Fi surveys using Ekahau and RF design methodologies. Support deployment of Cisco SD-WAN (Viptela) and related WAN connectivity solutions. Design and maintain LAN switching environments including VLANs, STP, RSTP, MSTP, EtherChannel, and QoS configurations. Configure and troubleshoot routing protocols including BGP and OSPF across enterprise WAN environments. Support integration of alternative connectivity solutions including 5G and satellite-based networks. Produce detailed network designs, implementation plans, and operational support documentation. Engage with stakeholders across technical and business teams to ensure successful delivery of network solutions. Required Skills & Experience Minimum Cisco CCNP certification (CCIE preferred) Certified Wireless Networking Professional (CWNP) highly desirable Strong experience with Wireless LAN technologies, including: Cisco WLAN / Cisco ISE Aruba WLAN / Aruba ClearPass Experience with RF design and Wi-Fi survey tools (Ekahau) Strong knowledge of Cisco SD-WAN (Viptela) In-depth understanding of routing protocols (BGP, OSPF) Strong experience in LAN switching technologies, including: VLANs, STP, RSTP, MSTP EtherChannel, switch stacking QoS, segmentation, and redundancy Experience with carrier WAN, internet services, and cloud networking services Ability to create detailed technical documentation, designs, and operational support models Strong stakeholder management and cross-functional coordination skills Desirable Experience Private 5G networking solutions (e.g. Cradlepoint) Experience with disaster recovery networking architectures Large-scale enterprise network transformation programmes Experience working in regulated or complex enterprise environments