Network Engineer

CBSbutler Holdings Limited trading as CBSbutler; Gloucester; On-site; GBP 88,000 - 95,000; Full time

Job summary

CBSbutler is seeking an experienced Network Engineer to join a specialist defence network team, maintaining a high‑assurance environment and supporting operation, maintenance and evolution of secure services.

The role demands strong networking and firewall expertise, Palo Alto experience and cryptographic technologies, with SC/DV clearance and a Sole British national context. The position is UK‑based and highly security‑minded.

Qualifications

• Extensive professional Network Engineering experience.
• CCNP or equivalent networking certification.
• Palo Alto firewalling and cryptographic tech experience.
• Experience in secure defence/government environments.

Responsibilities

• Operate and maintain a complex secure network environment, including gateways and cross-connects to international networks.
• Monitor network performance, identify outages proactively and ensure SLAs are maintained.
• Design and implement network and architectural changes in line with project and service requirements.
• Provide technical consultation to delivery teams and senior stakeholders.
• Work with defence stakeholders and international partners to design, coordinate and deliver network initiatives.
• Manage network perimeter security, internet-facing security policies and deployed network assets.
• Support software-defined networking and inter-enclave firewalling.
• Contribute to the design and delivery of service provider and data centre network solutions.
• Develop and maintain comprehensive technical documentation using tools such as Confluence.
• Support the configuration and management of secure networking and cryptographic technologies.

Skills

Palo Alto

Cryptographic technologies

Network Engineering

CCNP or equivalent

Firewalling

PCNSE or equivalent

Multi-vendor networking

Network design & project delivery

Service provider networking

Data centre networking

High-grade encryption

Secure defence environments

Job description

Network Engineer

+6 months +

+Inside IR35

+ 475 - 515 a day

+SC / DV cleared role

+Sole British national only - due to nature of the project

Skills:

+Palo Alto

+Cryptographic technologies

+SC / DV clearance

We are seeking an experienced Network Engineer to join a specialist team supporting the operation, maintenance and continued development of a highly secure defence network environment.

This is a technically challenging role requiring strong networking and firewall expertise, with responsibility for maintaining network availability, delivering architectural changes and supporting secure, mission-critical services.

Key Responsibilities

• Operate and maintain a complex secure network environment, including gateways and cross-connects to international networks.
• Monitor network performance, identify outages proactively and ensure SLAs are maintained.
• Design and implement network and architectural changes in line with project and service requirements.
• Provide technical consultation to delivery teams and senior stakeholders.
• Work with defence stakeholders and international partners to design, coordinate and deliver network initiatives.
• Manage network perimeter security, internet-facing security policies and deployed network assets.
• Support software-defined networking and inter-enclave firewalling.
• Contribute to the design and delivery of service provider and data centre network solutions.
• Develop and maintain comprehensive technical documentation using tools such as Confluence.
• Support the configuration and management of secure networking and cryptographic technologies.

Essential Skills & Experience

• Extensive professional Network Engineering experience.
• CCNP or equivalent networking experience.
• Palo Alto Experience
• Strong firewalling experience, ideally PCNSE or equivalent.
• Strong experience across multi-vendor networking technologies.
• Proven experience in network design and project delivery.
• Experience with service provider and data centre networking.
• Experience working with high-grade encryption / cryptographic technologies.
• Experience operating within secure defence or government environments.
• Ability to present complex technical information to both technical and non-technical audiences.
• Strong stakeholder management and communication skills.

This is an excellent opportunity for an experienced Network Engineer to work on a technically complex, high-assurance network environment within the defence sector.