Senior Firewall Engineer - SNS

Charles Stanley & Co.; Greater London; On-site; GBP 80,000 - GBP 100,000; Full time

Job summary

A financial services firm in Greater London is looking for a Senior Firewall Engineer who will manage and enhance their firewall infrastructure. The role includes hands-on project delivery, technical support at the highest level, and mentoring of peers. Ideal candidates possess 5–7 years of experience with Palo Alto firewall platforms and have a proactive mindset. This is a significant opportunity to contribute to enterprise-level network security and collaborate on modernization projects.

Qualifications

• 5–7 years’ experience with Palo Alto firewall platforms.
• Strong background in enterprise network design for large user bases.
• Excellent communication and collaboration abilities.

Responsibilities

• Lead the design and implementation of enterprise‑scale firewall solutions.
• Provide Tier 3 support and resolve complex issues.
• Document solutions and mentor engineers.

Skills

Palo Alto firewall platforms

Enterprise network design

Excellent communication skills

Problem-solving skills

Education

PCNSE certification

CCNP certification

CISSP certification

Tools

F5 load balancing

SSL decryption

Cloud networking

Python

Ansible

SolarWinds

DataDog

Splunk

Job description

We’re seeking a Senior Firewall Engineer to take a leading role in managing, designing, and improving our enterprise firewall infrastructure. This is a hands‑on, senior position where you’ll deliver projects end‑to‑end, partner with architects and engineers, and drive innovation across both on‑prem and cloud environments.

As part of our team, you’ll be trusted to bring your expertise to complex challenges, provide Tier 3 technical support, and mentor colleagues while helping us modernize our infrastructure. You’ll work on routing, switching, and firewall projects that protect and enable a large‑scale enterprise network.

What you’ll do:

• Lead the design and implementation of enterprise‑scale firewall solutions.
• Research and recommend new technologies to strengthen our security posture.
• Partner with peers and management to deliver modernization projects.
• Provide Tier 3 support and proactively resolve complex issues.
• Document solutions and share knowledge across the team.
• Coach and mentor engineers to build collective expertise.

What we’re looking for:

• 5–7 years’ experience with Palo Alto firewall platforms (Panorama, NGFW, Prisma Access).
• Strong background in enterprise network design and implementation (10,000+ users).
• Excellent communication skills and the ability to collaborate across technical and non‑technical teams.
• Certifications such as PCNSE (required), CCNP or CISSP (desirable).
• A proactive mindset, strong problem‑solving skills, and the ability to balance multiple priorities.

Nice to have:

We’d love it if you also bring experience in some of the following areas:

• F5 load balancing, SSL decryption, and DNS geolocation.
• DDoS mitigation and advanced VPN solutions.
• Certificate management and PKI.
• NAC solutions (Forescout, Cisco ISE).
• Cloud networking and secure design for scalable environments.
• Automation and scripting (Python, Ansible).
• Monitoring platforms such as SolarWinds, DataDog, or Splunk.