**NTT Data Greece** team is looking for a Infrastructure **Subject Matter Expert (SME)** in Athens to work with our clients in the **European public sector.** We are seeking a highly experienced and knowledgeable **Infrastructure Subject Matter Expert** (SME) to provide strategic and technical guidance across infrastructure-related projects. The Infrastructure SME will play a critical role in ensuring the design, implementation, and maintenance of robust, scalable, and secure infrastructure solutions that align with organizational goals and industry best practices. **Your role:** + Provide expert-level guidance on infrastructure architecture, including servers, storage, networking, virtualization, and cloud platforms. + Collaborate with cross-functional teams to define infrastructure requirements and ensure alignment with business objectives. + Evaluate and recommend tools, technologies, and processes to ensure high availability, performance, and security. + Lead or support infrastructure-related projects, including migrations, upgrades, and new deployments. + Review and validate technical documentation, configurations, and operational procedures. + Ensure compliance with internal policies, industry standards, and regulatory requirements. + Mentor and support infrastructure teams by sharing knowledge and best practices. + Participate in incident response and root cause analysis for infrastructure-related issues. + Stay current with emerging technologies and trends in infrastructure and cloud computing. **Infrastructure:** + Operations of physical server + Storage (primary and back up) + Operating systems (Linux and Windows) + Hypervisor (VMware) and virtual machine + Kubernetes cluster management **** **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. + 8+ years of experience in IT infrastructure, with at least 3 years in a senior or SME role. + Deep expertise in areas such as data center operations, cloud platforms (e.g., AWS, Azure, GCP), networking (LAN/WAN, firewalls, VPNs), virtualization (VMware, Hyper-V), storage and backup solutions. + Strong understanding of ITIL, DevOps, and security frameworks. + Excellent communication and documentation skills. + Proven ability to lead and influence technical teams. + Fluency in English (B2 level minimum); knowledge of another European language is a plus. **You must be eligible for EU Security Clearance (at least 5 years of EU nationality in required).** *This role may require flexibility, including shift-based work and on-call responsibilities, depending on operational needs