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Proactive.IT Appointments Ltd.

Senior Network Engineer

Proactive.IT Appointments Ltd.
United Kingdom · Full-time · Not Applicable

Senior Network Engineer


Hybrid - Palo Alto - F5 Load Balancers


This is a senior-level engineering role focused on enterprise network design, implementation, security and modernisation. The successful candidate will take ownership of complex infrastructure initiatives, working closely with architecture teams and senior stakeholders to deliver projects from concept through to full implementation.


The position requires strong technical leadership, hands-on engineering expertise, and the ability to manage multiple work streams in a large, regulated enterprise environment.


With multiple positions available, there is a focus on Palo Alto or F5 Load Balancers experience.


Key Responsibilities


  • Implement new network and network security technologies as defined by enterprise architecture.
  • Build, configure and test network infrastructure solutions across on-prem and cloud environments.
  • Contribute to the research and recommendation of innovative technologies to improve performance, resilience and scalability.
  • Engineer solutions using enterprise blueprints and standards.
  • Design and implement resilient architectures with disaster recovery and business continuity in mind.
  • Work with technologies including switches, routers, firewalls, wireless platforms, SDN fabrics, load balancers, NAC and cloud networking components.
  • Provide Tier 3 engineering support for complex incidents and escalations.
  • Participate in a 24x7 on-call rotation as required.
  • Produce and maintain detailed network documentation using Microsoft Visio.
  • Maintain and continuously improve network security posture in line with regulatory frameworks including PCI-DSS, PII, CIS and NIST.


Required Experience & Skills


  • 5–7+ years of experience designing, implementing and supporting medium to large enterprise networks (10,000+ users).
  • Palo Alto firewall platforms (Pan-OS, Threat Prevention, User-ID, GlobalProtect, HA, Prisma Access).
  • F5 BIG-IP platforms (LTM, GTM, APM, ASM / Cloud WAF).
  • Strong hands-on experience with Cisco enterprise technologies.
  • CCNP Enterprise (R&S) level knowledge required.
  • 1–2 years’ experience designing and supporting data centre spine-leaf fabrics (Cisco / Arista).
  • Experience with Cisco DNA Center.
  • Experience with SD-WAN technologies (Cisco, Palo Alto ION).
  • Enterprise-scale Cisco Wireless experience (WLC, FlexConnect, CAPWAP).


Desirable Experience


  • Remote access VPN technologies.
  • Certificate lifecycle management (Venafi, PKI).
  • NAC solutions (Cisco ISE, Forescout).
  • Infoblox DNS / IPAM.
  • Cloud networking design and security principles.
  • Automation and scripting (Python, Ansible).
  • Network monitoring tools such as SevOne, SolarWinds, Datadog or Splunk.
  • Knowledge of network security architecture, IDS/IPS, VPNs and SSL technologies.

Key Skills

Ranked by relevance

network security cloud palo alto wireless firewalls firewall routers datadog python vpns vpn wan ssl nac dns cis dss asm sdn pan ha
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Posted
Mar 31, 2026
Type
Full-time
Level
Not Applicable
Location
London Area

Industries

IT Services IT Consulting

Categories

Information Technology

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