**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. Everything we do is underpinned by our **core values** of 'Teamwork', 'Foresight' and 'Clients First'. Our shared **leadership principles** of Collaboration, Engagement and Curiosity help us build a community where our people are equipped with the best resources to face new challenges. **As a Network Team Lead** , you will be responsible for designing, implementing, and managing cloud computing architecture. You will play a crucial role in helping customers leverage cloud technologies to achieve its goals efficiently and securely. **Your role:** + Oversee the configuration, monitoring and maintenance of LAN, WAN, VPN and firewalls environments. + Lead and mentor a team of network engineers. + Assure implementation of scalable, secure and high-performance network solutions. + Lead incident response efforts and performing post-incident analysis regarding network infrastructure. + Implement and maintain network monitoring tools. + Collaborate with cross-functional teams or infrastructure projects, disaster recovery plans and cloud networking initiatives. + Analyse network performance and optimize speed and reliability. + Ensure compliance with relevant regulations and industry standards. + Manage vendor relationship and evaluate network product/services. + Oversee the development of network configuration and diagrams. + Provide technical guidance during incidents and ensure root cause analysis and documentation. + Provide regular updates to senior management on network availability. **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 **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:** + Bachelor’s or Master’s degree in Computer Science, Information Technology, or a related field. + Minimum 8 years of experience in network engineering roles, with at least 2-3 years in a supervisory or lead capacity. + Professional certifications such as CCNP/CCIE (Cisco), Fortinet NSE, Juniper JNCIP/JNCIE + ITIL certification is a plus. + Deep knowledge of network security technologies (firewalls, IDS/IPS, VPNs, encryption). + Deep understanding of IP routing and switching. + Proficiency with Layer2/Layer3 network protocols and technologies. + Familiarity with network monitoring and diagnostic tools. + Strong problem-solving and analytical skills. + Experience with cloud networking (AWS, Azure or GCP). + Strong communication and interpersonal skills to interact effectively with diverse teams and stakeholders. + Project management skills and ability to manage multiple priorities. + High attention to detail and commitment to operational excellence. + Fluency in English (B2 level minimum); knowledge of another European language is a plus. + EU citizenship is required. *This role may require flexibility, including shift-based work and on-call responsibilities, depending on operational needs. *The service window for this project is between 9am-10pm, the exact daily shifts will be confirmed later in the process.