Network Engineer

We are looking for a highly skilled Network Engineer to join our team and play a pivotal role in designing, implementing, and maintaining secure, reliable, and high‑performing network environments. This role is ideal for someone who thrives in complex technical environments, enjoys ownership, and is committed to delivering robust and scalable network solutions.

This is a hybrid position based at our welcoming offices in Reading
, with three days in the office and two days working from home.

We welcome applications from everyone. If you require any adjustments during the recruitment process, please let us know—we’re here to support you.

• Design and implement secure network architecture deploy LAN, WAN, WLAN, and VPN solutions.
• Take ownership of secure, high-performance network environments across internal systems and managed customer environments, liaising directly with the MNO’s Technical Leads.
• Ensuring all installations via SWC’s are as per LLD, directly responsible for validating this part of the delivery.
• Optimise network architecture for high availability, redundancy, and scalability.
• Experience of Telecoms Security Act and how hardware choices and configuration impacts TSA compliance
• Ensuring that TSA compliance is maintained via audits and updating other teams such as legal, IT to ensure a consistent approach across all domains
• Responsible for the scaling & upgrade designs for the data centre for Neutral Host In-building Solutions
• Network Operations & Troubleshooting
• Monitor and maintain network performance using NMS tools (e.g., Solar Winds)
• Perform regular security audits, risk assessments, and penetration tests

• Step into a role that values your expertise and supports your career development.
• Be part of a collegiate team that supports a growth mindset.
• Amongst other benefits -
• 28 days annual leave plus bank holidays
• 10% /
  20% target annual bonus
  * amend as needed
• Enhanced Maternity, Paternity & Adoption leave offering;
  26 weeks full basic pay for Maternity leave, followed by 13 weeks SMP – Enhanced leave is intended for all parents, whatever your family setup may be.
• Income protection & Life assurance
• Hybrid working model (3 days in the office, 2 days remote)
• Apply now and help shape the future of connectivity with Cellnex UK.

• Expert knowledge of TCP/IP, DNS, DHCP, BGP, OSPF, VLANs, MPLS
• Hands‑on experience with Fortinet (e.g. Forti Gate, Fortinet SD‑WAN solutions, Forti Analyzer) and Core network infrastructure (Cisco focus)
• Knowledge of firewall rules, VPNs, and security protocols
• Familiarity with global networks in regulated or tightly controlled environments
• Proficiency in network monitoring and troubleshooting tools (Forti Manager, Solar Winds, Wireshark, SNMP, etc.).

Cellnex Telecom is a leader in communication, technology and innovation and employs over 2000 people. We want everyone to feel valued by creating a culture of inclusion and belonging. We do this by empowering all our people to be authentic and share their ideas and experiences to ensure we have diversity of perspective. Only by doing this will we be a truly innovative forward‑thinking organisation.

Cellnex is Europe’s and the UK’s largest and fastest-growing independent owner and neutral operator of wireless telecoms infrastructure and is integral to the successful rollout of 5G. With the wireless infrastructure foundation that we deliver across rural and urban areas, Cellnex UK helps to connect everyone, everywhere - reducing digital inequality and supporting socio‑economic growth. Our networks and solutions are built to be fit for now and the future so that the UK can prosper.

We are a business built on commercial and technical innovation, ambition and sustainable growth.

We provide high‑speed connectivity for sports stadia, shopping centres, campuses, railways, ports and even in the air. Whenever you’re out in public, and you call a loved one, scroll through social media, watch a funny video or check if your train is running on time, there’s a high chance that our infrastructure is enabling your connection.

World’s Most Sustainable Companies of 2025 | TIME

City Centres, connected streets, shared dreams - Connecting the Dots

Please note that agency support is not required for this role, and unsolicited candidate submissions will not be considered. All candidate referrals must be submitted through our Applicant Tracking System (ATS).