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

Hurry & apply!

#UST

Skills

cloud network,network architecture,cisco aci,firewall engineering,vlan,azure arc,cisco asa,dns administration,wide area network,f5 load balancer,virtual private network,switching protocols

About UST

UST is a global digital transformation solutions provider. For more than 20 years, UST has worked side by side with the world’s best companies to make a real impact through transformation. Powered by technology, inspired by people and led by purpose, UST partners with their clients from design to operation. With deep domain expertise and a future-proof philosophy, UST embeds innovation and agility into their clients’ organizations. With over 30,000 employees in 30 countries, UST builds for boundless impact - touching billions of lives in the process.