**NTT DATA – a part of NTT Group - is a Top 10 global IT services provider, headquartered in Tokyo, with over 150,000 employees.** We deliver **consulting solutions** by combining specialized sectorial knowledge, our transformation management skills and our large technology expertise (data, RPA, AI, low code, cloud, IoT, virtual reality), to keep our clients, as well as society, a step ahead in this digitally dynamic world. At **NTT DATA** everything we do is guided by our **core values** . We respect every **voice** , think **bold** , deliver the **outcome** and win **together** . Our leadership approach enables our people to feel **inspired** to contribute, **empowered** to take initiative, and genuinely **cared** for in their growth and wellbeing. **NTT Data Greece** team is looking for a **Senior Network Engineer** in Athens to work with our clients in the **European public sector.** As a Network Engineer, you will be responsible for designing, implementing, and maintaining secure and high-performance network infrastructure to support enterprise operations. You will work with a wide range of technologies and platforms to ensure seamless connectivity, security, and scalability across environments. **Your role:** · Configuring and managing network protocols such as TCP/IP, OSPF, BGP, VLANs, and VPNs. · Administering and troubleshooting firewalls including Cisco ASA and Juniper SRX. · Managing and optimizing network and security platforms such as Juniper NSM and Junos Space. · Supporting switching and routing infrastructure using Cisco Nexus, Cisco ISR, and managing Production, vMotion, and Management VLANs. · Implementing and maintaining load balancing solutions using F5 BIG-IP. · Collaborating with virtualization teams to support VMware, Citrix, and containerized environments. · Monitoring network performance, identifying bottlenecks, and implementing improvements. · Ensuring network security, availability, and compliance with organizational policies. · Documenting network configurations, procedures, and incident resolutions. · Providing support for network-related incidents and participating in on-call rotations as needed. **Why NTT DATA?** We value a **collaborative** and **supportive** environment, celebrating **curiosity** and **engagement** We are committed to supporting the physical, financial and emotional well-being our of employees **Career development.** Training path and access to learning opportunities, yearly performance reviews and a mentorship program. We believe in work-life balance and flexibility. Wear casual clothing, decide your working hours and enjoy our hybrid working model Wear casual clothing, decide your working hours and enjoy our hybrid working model **Talent Friends.** Refer a friend and receive a **bonus** when they join **We care about you** **Health & well-being.** Focus on your mental health with access to a platform with certified psychologists & mental health workshops. Take a break with one of our online fitness and well-being sessions **Diversity & inclusion.** We are committed to equal employment opportunities regardless of gender, gender expression and identity, sexual orientation, religion, culture, origin, disability, age, or other personal and social characteristics. **\#WeAreAllUnique** **\#YouMakeUsUnique** Please let us know if you require us to accommodate any accessibility needs during the recruitment process. **Benefits at NTT DATA Greece** Health insurance for the employee and one dependent family member (100% paid by NTT DATA) Meal vouchers of 120€ per month (x12) Corporate mobile phone: subscription & device Teleworking equipment allowance Udemy Account Access to Open Up mental health service 28 days of paid annual leave consisting of your legal holidays and compensation days **Your profile:** · Strong understanding of network protocols and routing technologies (TCP/IP, OSPF, BGP, VLANs, VPN). · Hands-on experience with Cisco ASA and Juniper SRX firewalls. · Proficiency in managing Juniper NSM and Junos Space platforms. · Experience with Cisco Nexus and ISR devices in enterprise environments. · Familiarity with F5 BIG-IP load balancers and their configuration. · You must be eligible for EU Security Clearance (at least 5 years of EU nationality in required).