Network Implementation Engineer

We are looking for:

A Senior Network Engineer who wants to work on enterprise-scale environments and real network transformation projects, not only day-to-day operations.

Your day at NTT DATA

The Senior Network Engineer (L3) is a hands-on technical expert responsible for design, implementation, and optimization of complex enterprise network environments, with a strong focus on project delivery and technical ownership.

You will work on both strategic initiatives (e.g. migrations, redesigns, modernization) and advanced operational challenges, acting as a key escalation and engineering authority.

Key Responsibilities

• Lead design and implementation of enterprise LAN/WAN/WLAN solutions

• Take ownership of network transformation projects (e.g. SDA, SD-WAN, DC migrations, network redesigns)

• Define and implement network architecture aligned with business and technical requirements

• Act as L3 escalation point for complex incidents and critical issues

• Work with network automation and configuration tools (e.g. Ansible, APIs, scripting)

• Participate in solution design reviews and technical governance

• Lead troubleshooting and perform deep root cause analysis across multi-domain environments

• Drive technical decision-making in projects and operational improvements

• Plan and execute network changes, upgrades, and migrations (including risk mitigation)

• Collaborate with architects, project managers, vendors, and global teams

• Contribute to standardization, automation, and continuous improvement of network services

• Support pre-sales or technical consultations when required (solution input, feasibility

Your Profile

• 5+ years of experience in Network Engineering (including L3 / senior responsibilities)

• Strong experience in designing and implementing enterprise networks (not only operations)

• Proven track record of working on projects (migration, rollout, transformation)

• Strong ownership mindset and ability to independently drive technical topics

• Experience acting as escalation point and handling critical incidents

• Ability to work across teams and coordinate technical activities end-to-end

• Fluent in Polish and English (mandatory)

Technologies

Core:

• Cisco networking (Catalyst / Nexus – routing & switching)

• Routing protocols: OSPF, BGP

• L2/L3 concepts: VLANs, STP, QoS

Security:

• Cisco ISE / AAA (RADIUS/TACACS+)

Enterprise:

• WLAN (WLC, RF basics, design)

• SD-WAN solutions

• Cisco SD-Access (SDA)

Nice to have ( any of this will be additional asset):

• Data Center networking (Nexus, ACI)

• Network automation (Ansible, scripting, APIs)

• Firewall technologies (Palo Alto, Fortinet, Cisco)

• Cloud networking (AWS / Azure)

Certifications

• CCNP Enterprise or higher (strongly preferred)

• Additional vendor certifications are a plus

What you’ll work on

• Large-scale enterprise environments (multi-site, campus & WAN)

• Network transformation programs and modernization initiatives

• Data center and campus network redesigns

• End-to-end delivery (design → implementation → optimization)

• Cross-country / international projects

What we offer

• Work on real engineering projects – not only BAU/support

• Opportunity to influence architecture and technical direction

• Access to certifications and advanced technical training (Cisco, cloud, security)

• Hybrid work model (Warsaw + remote)

• Collaboration with experienced engineers and architects

• Stable role in a global organization (NTT DATA)

Workplace type:

Equal Opportunity Employer
NTT DATA is proud to be an Equal Opportunity Employer with a global culture that embraces diversity. We are committed to providing an environment free of unfair discrimination and harassment. We do not discriminate based on age, race, colour, gender, sexual orientation, religion, nationality, disability, pregnancy, marital status, veteran status, or any other protected category. Accelerate your career with us. Apply today