Find a job 
Featured Companies 
Featured Universities 
For Companies At a Glance
- Tasks: Manage and troubleshoot advanced network security systems while leading innovative projects.
- Company: Join Natobotics, a leader in cutting-edge technology and security solutions.
- Benefits: Competitive salary, onsite work, and opportunities for professional growth.
- Why this job: Make a real impact in network security and collaborate with global teams.
- Qualifications: 10 years of experience in enterprise network security and strong technical skills.
- Other info: Dynamic environment with opportunities to mentor and lead junior engineers.
The predicted salary is between 48000 - 72000 £ per year.
Join to apply for the Senior Network Security Engineer role at Natobotics.
Experience: 10 years
Location: Guildford, UK
Work mode: Onsite
Key Responsibilities:
- Manage, configure, and troubleshoot Cisco ISE (TACACS+, RADIUS, Dot1X, CoA, Profiling).
- Administer and support Cisco ASA/FTD firewalls including ACLs, NAT, VPN, failover, clustering, and upgrades.
- Manage Check Point (R80.x) firewalls – policy management, clustering, VPN, logging, and health checks.
- Handle F5 APM for remote access VPN, SSO, authentication, and application access.
- Support data center network security architecture (firewalls, segmentation, VRF, routing, switching security).
- Implement, install, and decommission security devices (ASA/FTD, Check Point, ISE nodes, F5 APM).
- Lead hardware refresh, firewall replacement, and migration projects.
- Execute device decommissioning, including cleanup, rule removal, rack removal, documentation, cutover activities, change execution, and post‑implementation validation.
- Participate in designing secure network architectures for enterprise and data center environments.
- Work with cross‑functional teams to review network and security requirements and create HLDs/LLDs, network diagrams, migration plans, and SOPs.
- Act as L4 SME for escalations related to network security issues.
- Troubleshoot identity/authentication failures, VPN issues, firewall packet drops, and routing conflicts.
- Perform root‑cause analysis (RCA), remediation plans, long‑term fixes, and monitor system health, logs, and alerts across multiple platforms.
- Ensure compliance with security standards (ISO 27001, NIST, PCI‑DSS, CIS benchmarks).
- Conduct rule/policy optimisation, cleanup, audits, and maintain device firmware/software at secure and supported versions.
- Document procedures and provide knowledge transfer to L1/L2 teams.
Technical Skills & Experience:
- Cisco ISE (expert level) – Authentication policies, authorization profiles, profiling, certificates, device onboarding.
- Cisco ASA/FTD – VPN, NAT, ACL, clustering, routing, packet tracer, FMC.
- Check Point R80.x – SmartConsole, VPN, IPS, rule optimisation, HA/cluster.
- F5 APM – Access policy creation, VPN configuration, SAML/OAuth integration.
- Cisco Switching/Routing in DC – Nexus (5k/7k/9k), VLANs, VPC, OSPF/BGP basics.
- Packet capture tools: Wireshark, tcpdump.
- Cloud networking (AWS/Azure) – plus.
- Automation/Scripting: Python, Ansible – preferred.
Experience:
- 6–10+ years in enterprise Network Security.
- Experience in distributed, high‑availability environments.
- Proven track record of leading install, upgrade, migration, and decommission projects.
- Experience handling major incidents and RCA documentation.
Soft Skills:
- Excellent communication and documentation skills.
- Strong analytical and troubleshooting capability.
- Ability to lead changes independently and collaborate with global teams.
- Ability to mentor junior engineers.
Senior Network Security Engineer (L4) employer: Natobotics
Contact Detail:
Natobotics Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Senior Network Security Engineer (L4)
✨Tip Number 1
Network with industry professionals! Attend meetups, webinars, or conferences related to network security. This is a great way for us to make connections and learn about job openings that might not be advertised.
✨Tip Number 2
Show off your skills in practical ways! Consider creating a portfolio of projects or case studies that highlight your experience with Cisco ISE, ASA/FTD, and Check Point firewalls. This can really set us apart from other candidates.
✨Tip Number 3
Prepare for interviews by brushing up on common technical questions and scenarios related to network security. We should also be ready to discuss our past experiences with troubleshooting and project management.
✨Tip Number 4
Don’t forget to apply through our website! It’s the best way to ensure your application gets seen by the right people. Plus, we often have exclusive roles listed there that you won’t find anywhere else.
We think you need these skills to ace Senior Network Security Engineer (L4)
Some tips for your application 🫡
Tailor Your CV: Make sure your CV is tailored to the Senior Network Security Engineer role. Highlight your experience with Cisco ISE, ASA/FTD firewalls, and Check Point firewalls. We want to see how your skills match up with what we're looking for!
Craft a Compelling Cover Letter: Your cover letter is your chance to shine! Use it to explain why you're the perfect fit for this role at Natobotics. Share specific examples of your past projects and how they relate to the responsibilities listed in the job description.
Show Off Your Technical Skills: Don’t hold back on showcasing your technical skills! Mention your expertise in automation/scripting with Python or Ansible, and any experience you have with cloud networking. We love seeing candidates who can bring that extra edge to our team.
Apply Through Our Website: We encourage you to apply through our website for a smoother application process. It helps us keep track of your application and ensures you don’t miss out on any important updates from us!
How to prepare for a job interview at Natobotics
✨Know Your Tech Inside Out
Make sure you’re well-versed in the specific technologies mentioned in the job description, like Cisco ISE, ASA/FTD firewalls, and Check Point R80.x. Brush up on your knowledge of authentication policies, VPN configurations, and troubleshooting techniques, as these will likely come up during technical questions.
✨Prepare Real-World Examples
Think of concrete examples from your past experience that showcase your skills in managing network security projects, handling incidents, or leading migrations. Be ready to discuss how you’ve tackled challenges, optimised policies, or collaborated with cross-functional teams.
✨Showcase Your Soft Skills
Don’t forget to highlight your communication and mentoring abilities. The role requires collaboration with global teams and guiding junior engineers, so be prepared to share instances where you’ve successfully led a team or communicated complex ideas clearly.
✨Ask Insightful Questions
At the end of the interview, have a few thoughtful questions ready about the company’s network security strategies or upcoming projects. This shows your genuine interest in the role and helps you gauge if the company is the right fit for you.
