iO Associates
Network Security Engineer (SC Cleared)
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Network Security Engineer (SC Cleared)
Location: Mostly remote (UK) with occasional travel to customer sites (Wokingham, Corsham, Farnborough, Warwick; Reading/Berkshire base)
Contract: 6 months (ASAP start - July/August 2026)
Rate: £300/day Outside IR35
Clearance: Active SC clearance required
Overview
We're looking for a hands-on Network Security Engineer with active SC to support a leading telecoms end client via a global IT consultancy. This is a predominantly remote contract, with occasional on-site visits to UK customer locations.
Key Responsibilities
- Provide technical ownership of the customer's security infrastructure estate, including processes, documentation, and lifecycle management.
- Act as the technical point of contact and escalation for security-related changes and project work, particularly around firewall rulebases.
- Deliver BAU and project support across both:
- Physical changes (on-site/hardware) and
- Remote changes (configuration/support)
- Manage change control activities, customer inventory tracking, hardware/software oversight, and EOL/EOS planning.
- Liaise with vendors for incident resolution and technical support cases.
- Contribute to network/security design work, supporting HLD/LLD production and updates.
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Essential Skills / Experience
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- Strong, recent hands-on experience with:
- Palo Alto (firewalls / network security)
- F5
- Zscaler
- Proven experience supporting enterprise security infrastructure in a change-controlled environment.
Desirable / Nice to Have
- Additional security/network technologies: Checkpoint, Juniper, Bluecoat
- Broader Cisco networking exposure (switching/routing/wireless) plus:
- QoS / 802.1x
- DNS tooling (e.g., Infoblox)
- VPN technologies (IPsec / SSL VPN / DMVPN)
- WAN routing protocols
- Telecoms industry experience
Eligibility
Applicants must be eligible to work in the UK and hold active SC clearance.
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