Line Network Support Engineer - ISP

Hamilton Barnes Associates Limited; Greater London; Hybrid; GBP 50,000 - 70,000; Full time

Benefits offered by this job

No on-call rota

9am–5pm working hours, Mon-Fri

Hybrid working with 3 days in office

Training and development support

Stable environment

Job summary

A leading global communications firm seeks a technical specialist for a 3rd line escalation role. You will troubleshoot advanced network issues across various environments, including LAN, WAN, and SD-WAN. The position requires CCNP-level skills and experience with HPE Aruba. Offering competitive salary (£50k–£70k) and hybrid working, this role gives you the chance to work in a well-run environment that fosters growth and development.

Qualifications

• CCNP-level certification is essential.
• Strong background in routing and switching.
• Experience as 3rd line support.

Responsibilities

• Act as a 3rd line escalation point for complex network incidents.
• Troubleshoot issues across LAN, WAN, and SD-WAN.
• Support and optimise HPE Aruba switching estates.
• Work with Fortinet and Palo Alto SD-WAN platforms.
• Collaborate on network improvements.
• Perform root cause analysis and implement fixes.
• Maintain technical documentation.
• Support secure network operations.

Skills

CCNP-level skills

Enterprise networking background

Hands-on experience with HPE Aruba switching

SD-WAN experience

3rd line support capacity

Eligible for SC Clearance

Tools

HPE Aruba switching

Fortinet SD-WAN

Palo Alto Prisma SD-WAN

Job description

Are you ready to be part of an organization shaping the future of global connectivity and digital transformation?

Join a global communications and technology leader delivering secure network, cloud, and digital solutions to businesses and public sector organizations across more than 180 countries. With a strong focus on innovation, cybersecurity, and next-generation connectivity, the organization helps customers modernize infrastructure, enhance customer experiences, and operate more efficiently in an increasingly complex digital world. Backed by global scale, deep technical expertise, and a reputation for reliability, it partners with organizations to drive transformation, improve resilience, and support long-term, sustainable growth.

Ready to make an impact with a team that connects the world? Apply today.

Responsibilities

• Act as a 3rd line escalation point for complex network incidents and problems.
• Troubleshoot advanced issues across LAN, WAN, and SD-WAN environments.
• Support and optimise HPE Aruba switching estates.
• Work with Fortinet SD-WAN and Palo Alto Prisma SD-WAN platforms.
• Collaborate with design and project teams on network improvements and changes.
• Perform root cause analysis and implement permanent fixes, not just workarounds.
• Maintain high-quality technical documentation and knowledge base articles.
• Support secure network operations within regulated and sensitive environments.

Skills / Must Have

• CCNP-level skills with a current professional-level certification (essential).
• Strong enterprise networking background (routing & switching).
• Hands-on experience with HPE Aruba switching.
• SD-WAN experience (vendor-agnostic accepted).
• Ability to operate confidently in a 3rd line support capacity.
• Eligible for SC Clearance (or already SC cleared).

Nice to Have

• Fortinet SD-WAN experience.
• Palo Alto Prisma SD-WAN exposure.
• Experience supporting large, multi-site network estates.

Benefits

• No on-call rota.
• Working hours: 9am–5pm, Monday to Friday.
• Hybrid working with 3 days per week in the office.
• Choice of office locations: London, Belfast, Birmingham, Sheffield, Manchester, Bristol
• Training and development support to keep certifications current.
• Stable, well-run environment with clear technical ownership.

Salary

• £50,000 – £70,000 per annum, depending on experience.