Senior Network Engineer

ITDS; Lisboa; Hybrid; EUR 60,000 - 90,000; Full time

Job summary

ITDS in Lisbon is seeking a Senior Network Infrastructure Engineer to lead cutting-edge network transformation projects. This hybrid role allows up to 2 remote days per week.

You will monitor wired and wireless networks, manage NAC with 802.1X, RADIUS, and ISE, and spearhead upgrades of Cisco Nexus/NX-OS switches and Wi‑Fi platforms. You will act as the senior technical lead, ensuring changes are planned and securely executed for stability and security.

Qualifications

• 6+ years of network engineering experience.
• Hands-on with Cisco Nexus/NX-OS and IOS/IOS-XE administration.
• Experience upgrading Cisco switches and Wi-Fi environments.

Responsibilities

• Monitor and maintain the network estate; respond to alerts across wired, wireless, access, and core networks.
• Support NAC and authentication-related issues for secure connectivity.
• Lead change windows and implement fixes to optimize performance.
• Maintain documentation, runbooks, and improve monitoring/observability tools.
• Lead infrastructure transformation including Nexus/NX-OS upgrades and Cisco Wi-Fi improvements.
• Deploy NAC solutions (802.1X, RADIUS, ISE) for secure access.
• Deploy Cisco Catalyst Center for network management and automation.
• Act as senior technical lead to plan and safely execute changes.

Skills

Network engineering

Change management

Monitoring & observability

Automation tools

Technical leadership

English communication

Tools

Cisco Nexus/NX-OS

Cisco IOS/IOS-XE

Cisco Catalyst Center

NAC (802.1X, RADIUS, ISE)

Job description

Empower your career by leading cutting-edge network infrastructure projects that shape the future of connectivity!

Location & Work Model

Lisbon-based opportunity with hybrid work model (up to 2 remote days per week).

As a Senior Network Infrastructure Engineer, you will be working for our client, a prominent European institution committed to advancing digital transformation through innovative network solutions. Your expertise will play a crucial role in enhancing and transforming critical network systems, ensuring operational stability, security, and scalability. This role offers a chance to contribute to impactful projects while developing your professional skills in a dynamic environment.

Your main responsibilities:

• Monitor and maintain the network estate, promptly responding to alerts and troubleshooting issues across wired, wireless, access, and core networks.
• Support NAC and authentication-related issues, ensuring seamless connectivity and security.
• Participate in scheduled change windows and implement ad hoc fixes to optimize network performance.
• Maintain comprehensive documentation, runbooks, and improve monitoring and observability tools.
• Lead infrastructure transformation initiatives, including replacing legacy Cisco switches with Cisco Nexus/NX-OS and upgrading Wi-Fi environments with Cisco wireless platforms.
• Implement Network Access Control (NAC) solutions, including 802.1X, RADIUS, and ISE, ensuring secure network access.
• Deploy Cisco Catalyst Center (formerly DNA Center) as the primary network management platform, enhancing automation and configuration management.
• Act as the senior technical lead, ensuring changes are planned, executed safely, and operational stability maintained.

You're ideal for this role if you have:

• Minimum 6 years of experience in network engineering or related fields.
• Hands-on expertise with Cisco Nexus/NX-OS and IOS/IOS-XE administration.
• Proven experience with switch upgrades, replacements, and Cisco Wi-Fi implementation.
• Familiarity with NAC solutions like 802.1X, RADIUS, and ISE.
• Strong understanding of change management disciplines and operational support.
• Willingness to learn and adaptability to evolving network technologies.
• Experience with monitoring, observability, and automation tools.

It is a strong plus if you have:

• Cisco Catalyst Center (formerly DNA Center) certification or experience.
• Previous involvement in infrastructure transformation projects.

Language Required for the role:

Fluent English – excellent written and verbal communication skills.

Eligibility to work in Europe:

Only candidates with an existing legal right to work in the European Union will be considered for this role.