Senior Network Infrastructure Engineer – Cisco & Wireless Expertise
First seen by Alion on Oct 12, 2026.
Hook –
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: (optional)
- 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.
#MAKEYourCareerBETTER
Interested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data.
https://itdsportugal.com/en/it-jobs/10140/?utm_source=itjobs