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

Role description

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

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