Senior Network Engineer
4 days ago
City of London
Senior Network Engineer – Cloud, Security & Infrastructure 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. What You'll Be Doing: Network & Cloud Infrastructure • 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. Security, Compliance & Risk Management • Configure and manage security policies across Palo Alto, Check Point, Cisco ASA, and ForeScout 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. Performance, Reliability & Automation • 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 PowerShell., • 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. What We're Looking For: • Minimum of 8+ years' experience in Network Engineering, Cloud Networking, and Network Security., • Strong expertise across: Cisco Networking & Routing/Switching • Palo Alto, Check Point, Cisco ASA, and ForeScout, • F5 Load Balancing, • 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. Desirable Experience: • SIEM, IDS/IPS, and endpoint security integration., • Network monitoring and observability tools such as SolarWinds, LogicMonitor, Splunk, BigPanda, or Wireshark., • Container and Kubernetes networking concepts. Relevant certifications such as: • CCNP / CCIE, • PCNSE, • CCSA / CCSE, • F5-CA, • AWS or Azure Networking Speciality, • CISSP Hurry & apply! #UST