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

UST; Greater London; Hybrid; GBP 90,000 - 130,000; Full time

Job summary

UST is actively seeking a Senior Network Engineer to design, secure, and optimize enterprise and cloud networking across AWS, Azure, and GCP from London. The role is hybrid and permanent, with ASAP start and a focus on modern networking and security solutions.

You will lead the implementation of Zero Trust architecture, network automation, and vulnerability remediation while collaborating with Cyber Security and IT teams to maintain compliance and resilience in a complex multi-cloud environment.

Qualifications

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

Responsibilities

• Design, implement, and support enterprise and cloud networking solutions across AWS, Azure, and GCP.
• Manage routing and switching environments with BGP, OSPF, EIGRP, VLANs, STP, QoS, and Multicast.
• Administer F5 Load Balancers to deliver high availability and performance.
• Manage Infoblox DNS, DHCP, and IPAM services.
• Configure security policies across Palo Alto, Check Point, Cisco ASA, and ForeScout.
• Lead network patching, firmware upgrades, vulnerability remediation, and security hardening.
• Ensure compliance with ISO 27001, NIST, CIS Benchmarks, and PCI-DSS.
• Partner with Cyber Security teams to strengthen controls.
• Drive automation with Python, Ansible, Terraform, and PowerShell.
• Create and maintain technical documentation and network diagrams.
• Mentor engineers and contribute to continuous improvement.

Skills

Cisco Networking & Routing/Switching

Zero Trust Architecture

IaC & network automation

Cloud Networking (AWS/Azure/GCP)

Vulnerability management

Stakeholder engagement

Tools

F5 Load Balancer

Infoblox DNS/DHCP/IPAM

Palo Alto / Check Point / Cisco ASA / ForeScout

Job description

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