Senior Network And Security Engineer

Senior Network & Security Engineer (Cisco, Firewalls, L2 L3)

Long-Term Contract | Lisbon (Hybrid: 1 day onsite, 4 days remote) - Start date: February 2026

We are looking for an experienced Senior Network & Security Engineer to join a highly skilled infrastructure team supporting critical business services. This is a long-term contract role, based in Lisbon, offering a flexible hybrid working model (one day per week in the office).

You will play a key role in the design, implementation, and operation of enterprise-scale network and security infrastructure, while also providing technical leadership across projects and day-to-day operations.

Key Responsibilities

• Design, plan, and implement network and security infrastructure supporting multiple business units


• Provide operational support for daily activities and incident resolution in complex environments


• Lead and contribute to infrastructure projects, from design through delivery


• Act as a senior escalation point for network and security incidents


• Coordinate and lead a multidisciplinary team, ensuring high-quality delivery across network and security domains


• Mentor and support junior engineers, promoting best practices and knowledge sharing


• Collaborate closely with DevOps and automation teams to improve efficiency and reliability


• Ensure operational excellence, stability, and security across the environment

Key Technologies & Experience

Network & Security

• Firewalls: Check Point, Fortinet, Palo Alto


• Management Platforms: Provider-1, Panorama, FortiManager, FortiAnalyzer


• Load Balancers: F5 BIG-IP / BIG-IQ, A10


• L2/L3 Networking:


• Cisco ACI Fabric


• Cisco legacy platforms (Nexus 7k, 5k, 2k, 9k, ASR 9k)


• SSL VPN / SASE: Palo Alto SASE


• Monitoring & Observability: Netmetrix, Grafana

Automation & Tooling

• Security policy automation using Tufin


• Support for atomic function development for:


• Cisco ACI Fabric


• Palo Alto Panorama


• F5


• Close collaboration with DevOps teams on automation initiatives

Leadership & Soft Skills

• Proven experience leading technical teams


• Strong coordination and stakeholder management skills


• Ability to balance hands-on technical work with leadership responsibilities


• Clear communication skills and a proactive, solution-oriented mindset

Contract Details

• Contract Type: Long-term contract


• Location: Lisbon, Portugal


• Working Model: Hybrid – 1 day onsite / 4 days remote