Senior Network Security Engineer

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A community of passionate experts, bringing together deep technical expertise to help organisations scale, transform, and reach new levels of performance.

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Felps Group is an alliance of Pure Players, organised into four specialised Squads: Telecom, IT, Cybersecurity, and Change Management.

Each Squad is led by a Captain, a domain expert supporting consultants in mission selection, technical growth, and long-term career development.

At Felps Lisboa, we combine local market expertise with international delivery, placing high-impact talent into complex and evolving environments.

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At Felps, the consultant is at the centre of everything we do.

We focus on delivering meaningful roles where consultants can contribute, grow, and have real impact — particularly in data, automation, and AI-driven transformation projects.

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F5 BIG-IP Expert – Upgrades, Migrations & Vulnerability Remediation

Lisbon, Portugal (on-site) | International mission | ASAP start

Looking for an experienced F5 BIG-IP expert to join an international infrastructure security mission in Lisbon.

You'll be responsible for:

• Auditing existing F5 infrastructure (TMOS, modules, config)
• Planning and executing BIG-IP upgrades (LTM, GTM/DNS, ASM/AWAF, APM)
• Applying security patches under a vulnerability remediation plan
• Analyzing scan reports and prioritizing fixes
• Post-upgrade non-regression testing (HA, load-balancing, iRules/iApps)
• Documentation and rollback planning
• Coordinating with international security, network and infra teams

What we need:

• 5+ years hands-on F5 BIG-IP experience
• Strong TMOS upgrade / version lifecycle management
• Solid LTM, GTM/DNS, ASM/AWAF and/or APM knowledge
• Vulnerability remediation / patch management experience
• F5-CA or F5-CTS a plus
• Fluent English
• Based in or open to relocating to Lisbon

If this matches your profile, submit your CV — we'd like to hear from you.