Junior Network Engineer - SC Cleared

  • CBSbutler Ltd.
  • Portsmouth, Hampshire
  • 28/05/2026
Full time Information Technology Telecommunications

Job Description

Job Title: Junior Network Engineer

Location: Portsmouth (On-site); Contract Duration: Immediate start - End of July (initially); Day Rate: £300 - £350 per day Inside IR35; Security Clearance: Must hold active MOD SC clearance; Eligibility: UK Nationals only

Overview

We are seeking a Junior Network Engineer to join a project based in Portsmouth, supporting network infrastructure operations within a secure environment. This is an on-site role requiring immediate availability, with the potential for extension beyond the initial contract period.

Key Responsibilities
  • Support the configuration, maintenance, and troubleshooting of network infrastructure
  • Work with secure systems in line with MOD standards and procedures
  • Assist in firewall and network monitoring activities
  • Participate in planned network changes, upgrades, and weekend exercises where required
  • Provide support during shift rotations as needed
  • Collaborate with senior engineers and wider technical teams
Required Skills & Experience
  • Hands on experience with Fortinet Firewalls
  • Experience using Fortinet Analyzer
  • Knowledge of HPE Switches
  • Familiarity with BOWMAN communication systems
  • Understanding of network fundamentals (routing, switching, security principles)
Desirable Skills
  • Experience with VMware environments
Working Pattern
  • Monday to Friday (on site in Portsmouth)
  • Occasional weekend work and shift based support required
Candidate Requirements
  • Active MOD SC Clearance (essential)
  • Must be a UK National
  • Ideally based in or near Portsmouth
  • Available to start immediately
Additional Information

This role is suited to a junior level engineer looking to gain experience in a secure, high impact environment while working with leading networking technologies.