Senior Network Engineer - Consultancy

  • Hamilton Barnes Associates Limited
  • 03/05/2026
Full time Information Technology Telecommunications

Job Description

Responsibilities
  • Design, build, and implement enterprise network solutions
  • Deliver across a major data centre transformation programme
  • Support network migrations, optimisation, and traffic engineering
  • Decommission legacy infrastructure and consolidate services
  • Configure and manage routing, switching, and firewall technologies
  • Own network performance, stability, and continuous improvement
  • Produce technical documentation including runbooks and handovers
  • Collaborate with cross-functional teams across infrastructure and operations
  • Support planned migration activities (including occasional weekend work)
Skills / Must Have
  • Strong experience with Cisco Data Centre technologies
  • Solid Routing & Switching expertise (CCNP level or equivalent)
  • Proven ability to configure and troubleshoot enterprise-grade networks
  • Hands-on experience with Fortinet / FortiGate firewalls
  • Strong understanding of network security principles
  • Ability to operate both independently and within a team
  • Experience working in complex, large-scale environments
Desirable Skills
  • Experience with Juniper networking technologies
  • Exposure to Palo Alto firewalls
  • Background in financial services or regulated environments
Working Setup
  • Cisco Data Centre networking technologies
  • Enterprise routing and switching
  • Fortinet / FortiGate firewalls
  • Multi-vendor environments (Cisco, Juniper)
  • Large-scale enterprise network infrastructure
  • Data centre environments and migrations
Location & Working Pattern
  • London - Hybrid working
  • 3 days onsite (likely reducing to 1-2 days)
  • Occasional data centre visits
  • Some out-of-hours work during migration phases
Benefits
  • Work on a business-critical transformation programme
  • High ownership within a core engineering team
  • Exposure to large-scale, complex network environments
  • Strong visibility across infrastructure and leadership teams
Salary
  • £70,000 base salary
  • Competitive package depending on experience