Senior Network Engineer

Location: London (Hybrid)

Employment Type: Permanent / Fixed-Term Contract

Start Date: ASAP

Build, Secure and Transform Enterprise Networks

We're seeking a highly skilled Senior Network Engineer to join a growing technology team responsible for designing, securing, and optimizing enterprise and cloud network infrastructure across a complex, global environment.

This is an opportunity to lead the delivery of modern networking and security solutions, working across cloud platforms, next-generation firewalls, automation technologies, and compliance initiatives. You'll play a critical role in ensuring our network infrastructure remains secure, resilient, scalable, and future-ready.

If you're passionate about solving complex technical challenges, driving operational excellence, and working with leading technologies, we'd love to hear from you.

• Design, implement, and support enterprise and cloud networking solutions across AWS, Azure, and GCP.
• Manage and optimize routing and switching environments using technologies including BGP, OSPF, EIGRP, VLANs, STP, QoS, and Multicast.
• Administer and enhance F5 Load Balancers (LTM, GTM, ASM) to deliver high availability and performance.
• Manage Infoblox DNS, DHCP, and IPAM services to support efficient network operations.

• Configure and manage security policies across Palo Alto, Check Point, Cisco ASA, and Fore Scout platforms.
• Support the implementation of Zero Trust Architecture, micro-segmentation, VPNs, and secure access solutions.
• Lead network patching, firmware upgrades, vulnerability remediation, and security hardening activities.
• Ensure compliance with industry standards and frameworks, including ISO 27001, NIST, CIS Benchmarks, and PCI-DSS.
• Partner with Cyber Security teams to identify risks, strengthen controls, and enhance enterprise security posture.

• Monitor, troubleshoot, and optimize enterprise, cloud, and security infrastructure.
• Resolve complex LAN, WAN, cloud, and firewall issues to maintain business continuity.
• Drive automation and operational efficiency using tools such as Python, Ansible, Terraform, and Power Shell.
• Create and maintain technical documentation, network diagrams, security standards, and operational procedures.
• Mentor engineers and contribute to continuous improvement initiatives across the wider technology team.

• Minimum of 8+ years' experience in Network Engineering, Cloud Networking, and Network Security.
• Strong expertise across:

• Palo Alto, Check Point, Cisco ASA, and Fore Scout
• Infoblox DNS/DHCP/IPAM
• AWS, Azure, and/or GCP Networking
• Hands-on experience with vulnerability management, patching, firmware upgrades, and compliance controls.
• Strong understanding of network security principles, Zero Trust Architecture, SD-WAN, and micro-segmentation.
• Experience with Infrastructure as Code (IaC) and network automation.
• Excellent troubleshooting, stakeholder engagement, and communication skills.
• Experience working in complex enterprise or multi-cloud environments.
• SIEM, IDS/IPS, and endpoint security integration.
• Network monitoring and observability tools such as Solar Winds, Logic Monitor, Splunk, Big Panda, or Wireshark.
• Container and Kubernetes networking concepts.