Senior Network Security Engineer

Senior Network Security Engineer
Lisboa
Lisboa, Lisboa, Portugal

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
- 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
- scale network and security infrastructure, while also providing technical leadership across projects and
-
- 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
  - quality delivery across network and security domains
• Mentor and support junior engineers, promoting best practices and knowledge sharing
• Collaborate closely with Dev
  Ops 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, Forti
  Manager, Forti
  Analyzer
• 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 Dev
  Ops teams on automation initiatives

Leadership & Soft Skills

• Proven experience leading technical teams
• Strong coordination and stakeholder management skills
• Ability to balance
  - on technical work with leadership responsibilities
• Clear communication skills and a proactive,
  - oriented mindset

Contract Details

• Contract Type: Long-term contract
• Location: Lisbon, Portugal
• Working Model: Hybrid – 1 day onsite / 4 days remote