Firewall Engineer

Ref: BBBH66809_1778487168

Firewall Engineer

Whitehall Resources are currently looking for Service Design & Transition Manger based in South Yorkshire for an initial 6 -month contract.

Job Spec:
We are seeking an experienced Firewall Engineer to join the Firewall Engineering team, responsible for designing, implementing, and supporting enterprise network security solutions. The role requires strong hands‑on expertise with Fortinet and Juniper firewalls and the ability to operate at Level 3 (L3) support within a complex enterprise environment.

***INSIDE IR35***

Main responsibilities:
· Design, implement, and support Fortinet and Juniper firewall platforms.
· Provide L3 support for firewall‑related incidents, problems, and complex service requests.
· Troubleshoot advanced network and security issues across enterprise environments.
· Manage firewall rulebases, NAT policies, security zones, and objects in line with security standards.
· Support firewall changes, upgrades, patching, and migrations.
· Perform root‑cause analysis and drive permanent fixes for recurring issues.
· Collaborate with network, security, and infrastructure teams to ensure secure connectivity.
· Ensure compliance with internal security policies and regulatory requirements.
· Maintain accurate documentation, configurations, and operational procedures.
· Participate in on‑call rotas and provide out‑of‑hours and weekend support when required to support business‑critical services and incident resolution.

Key Skills:
· Minimum 5 years of hands‑on experience in firewall engineering or network security roles.
· Strong expertise in Fortinet (FortiGate) and Juniper (SRX) technologies.
· Solid understanding of L3/L4 networking concepts, routing, and traffic flow.
· Proven experience providing L3 operational support in production environments.
· Strong troubleshooting and analytical skills.
· Ability to work effectively under pressure, including during major incidents.

Desirable:
· Experience working in regulated or enterprise environments (e.g. banking or financial services).
· Exposure to high‑availability designs, VPN technologies, and security best practices.
· Relevant vendor certifications (e.g. Fortinet NSE, Juniper JNCIA/JNCIS).

All of our opportunities require that applicants are eligible to work in the specified country/location, unless otherwise stated in the job description.

Whitehall Resources are an equal opportunities employer who value a diverse and inclusive working environment. All qualified applicants will receive consideration for employment without regard to race, religion, gender identity or expression, sexual orientation, national origin, pregnancy, disability, age, veteran status, or other characteristics.

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