Senior Network Engineer_Cloud, Security & Infra (Architect II - Cloud Infrastructure Services) in London

Senior Network Engineer – Cloud, Security & Infrastructure

Location

London (Hybrid)

Employment Type

Permanent / Fixed‑Term Contract

Start Date

ASAP

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 role leads the delivery of modern networking and security solutions, working across cloud platforms, next‑generation firewalls, automation technologies, and compliance initiatives.

It requires ensuring that the network infrastructure remains secure, resilient, scalable, and future‑ready.

Responsibilities

• 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 BGP, OSPF, EIGRP, VLANs, STP, Qo S, 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 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.
• 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 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.

Qualifications

• Minimum of 8+ years of experience in Network Engineering, Cloud Networking, and Network Security.
• Strong expertise in Cisco Networking & Routing/Switching.
• Hands‑on experience with Palo Alto, Check Point, Cisco ASA, Fore Scout, F5 Load Balancing, Infoblox DNS/DHCP/IPAM, and 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 (Ia C) 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 Solar Winds, Logic Monitor, Splunk, Big Panda, or Wireshark.
• Container and Kubernetes networking concepts.
• Relevant certifications such as CCNP / CCIE, PCNSE, CCSA / CCSE, F5‑CA, AWS or Azure Networking Speciality, or CISSP.
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