DATACOM SME (Data Communication Subject Matter Expert

NTT DATA, Inc.; Dublin; On-site; EUR 120,000 - 180,000; Full time

Job summary

NTT DATA, Inc. in Ireland seeks an experienced DATACOM SME to provide technical leadership in enterprise networking and data communication. You will design, implement, optimize, and support complex network infrastructures while ensuring high availability, performance, and security.

The role requires collaboration with infrastructure, security, cloud, and operations teams to deliver reliable networking services and continuous modernization.

Qualifications

• Typically 8+ years of experience in Network Infrastructure, Data Communication, and Enterprise Networking.
• Hands-on expertise with leading network technologies and platforms such as Cisco, Juniper, Aruba, Huawei, Fortinet, or equivalent.
• Strong knowledge of network protocols including TCP/IP, BGP, OSPF, EIGRP, MPLS, DNS, DHCP, and routing/switching concepts.
• Strong understanding of Data Center networking architectures.
• Experience in network monitoring, troubleshooting, and performance optimization.
• Excellent analytical, communication, and stakeholder management skills.
• Ability to lead technical discussions and mentor junior engineers.

Responsibilities

• Design, implement, and maintain enterprise network infrastructure solutions.
• Provide subject matter expertise for LAN, WAN, WLAN, SD-WAN, VPN, and Data Center networking technologies.
• Lead network transformation and modernization initiatives.
• Perform network capacity planning, performance tuning, and optimization.
• Troubleshoot complex network issues and drive root cause analysis.
• Collaborate with Infrastructure, Security, Cloud, and Application teams to ensure seamless connectivity and service delivery.
• Support network security implementations including firewalls, NAC, segmentation, and secure access solutions.
• Develop network architecture, standards, operational procedures, and technical documentation.
• Participate in incident, problem, and change management processes.
• Evaluate new networking technologies and provide recommendations for continuous improvement.

Skills

Data Communication Technologies

Enterprise Networking

LAN / WAN / WLAN

SD-WAN

Routing & Switching

TCP/IP Protocol Suite

BGP, OSPF, EIGRP, MPLS

Cloud Networking (Azure, AWS, GCP)

Network Security

Network Automation (Ansible, Python,  

Education

Tools

Cisco Networking Solutions

Juniper Networks

Aruba Wireless

Ansible

Python

Job description

Make an impact with NTT DATA
Join a company that is pushing the boundaries of what is possible. We are renowned for our technical excellence and leading innovations, and for making a difference to our clients and society. Our workplace embraces diversity and inclusion – it’s a place where you can grow, belong and thrive.

Make an impact with NTT DATA
Join a company that is pushing the boundaries of what is possible. We are renowned for our technical excellence and leading innovations, and for making a difference to our clients and society. Our workplace embraces diversity and inclusion – it’s a place where you can grow, belong and thrive.
Your day at NTT DATA
We are seeking an experienced DATACOM SME (Data Communication Subject Matter Expert) to provide technical leadership and expertise in enterprise networking and data communication technologies. The ideal candidate will be responsible for designing, implementing, optimizing, and supporting complex network infrastructures while ensuring high availability, performance, scalability, and security. The role requires close collaboration with infrastructure, security, cloud, and operations teams to deliver reliable and efficient networking services.
In this role, You will

• Design, implement, and maintain enterprise network infrastructure solutions.
• Provide subject matter expertise for LAN, WAN, WLAN, SD-WAN, VPN, and Data Center networking technologies.
• Lead network transformation and modernization initiatives.
• Perform network capacity planning, performance tuning, and optimization.
• Troubleshoot complex network issues and drive root cause analysis.
• Collaborate with Infrastructure, Security, Cloud, and Application teams to ensure seamless connectivity and service delivery.
• Support network security implementations including firewalls, NAC, segmentation, and secure access solutions.
• Develop network architecture, standards, operational procedures, and technical documentation.
• Participate in incident, problem, and change management processes.
• Evaluate new networking technologies and provide recommendations for continuous improvement.

Required Qualifications

• Typically 8+ years of experience in Network Infrastructure, Data Communication, and Enterprise Networking.
• Strong experience in designing, implementing, managing, and troubleshooting large-scale enterprise network environments.
• Experience supporting LAN, WAN, SD-WAN, VPN, Wireless Networking, Network Security technologies, Data Center, and Cloud Connectivity solutions.
• Hands-on expertise with leading network technologies and platforms such as Cisco, Juniper, Aruba, Huawei, Fortinet, or equivalent.
• Strong knowledge of network protocols including TCP/IP, BGP, OSPF, EIGRP, MPLS, DNS, DHCP, and routing/switching concepts.
• Strong understanding of Data Center networking architectures.
• Experience in network monitoring, troubleshooting, and performance optimization.
• Knowledge of network redundancy, high availability, and disaster recovery concepts.
• Excellent analytical, communication, and stakeholder management skills.
• Ability to lead technical discussions and mentor junior engineers.

Desired Qualifications

• Cisco Certifications (CCNP, CCIE) or equivalent networking certifications.
• Juniper (JNCIP/JNCIE), Aruba, Fortinet, or Huawei certifications.
• Experience with Cloud Networking including Azure, AWS, and Google Cloud Platform.
• Knowledge of Network Automation tools such as Ansible, Python, Terraform, or similar technologies.
• Understanding of Network Security frameworks and Zero Trust principles.
• ITIL Foundation or Service Management experience.
• Experience working in global enterprise environments.
• Exposure to Software Defined Networking (SDN) and Network Function Virtualization (NFV).

Job Expectations

• Provide expert-level support and guidance for enterprise network environments.
• Ensure network availability, reliability, scalability, and security.
• Act as an escalation point for critical network incidents and operational issues.
• Drive network standardization, governance, and best practices.
• Collaborate effectively with business, infrastructure, cloud, and security stakeholders.
• Support infrastructure transformation and cloud migration programs.
• Deliver technical documentation, operational procedures, and solution designs.
• Continuously identify opportunities for network modernization and operational improvements.

Primary Skillset

• Data Communication Technologies
• Enterprise Networking
• LAN / WAN / WLAN
• SD-WAN
• Routing & Switching
• TCP/IP Protocol Suite
• BGP, OSPF, EIGRP, MPLS
• DNS & DHCP
• VPN Technologies
• Cisco Networking Solutions
• Juniper Networks
• Aruba Wireless
• Network Security
• Firewalls & Secure Access
• Data Center Networking
• Cloud Networking (Azure, AWS, GCP)
• Network Monitoring & Troubleshooting
• Network Performance Optimization
• Network Architecture & Design
• High Availability & Disaster Recovery
• Network Automation (Ansible, Python, Terraform)
• Incident, Problem & Change Management
• Infrastructure Transformation & Modernization

About NTT DATA
NTT DATA is a $30+ billion business and technology services leader, serving 75% of the Fortune 100. We are committed to accelerating client success and positively impacting society through responsible innovation. We are one of the world’s leading AI and digital infrastructure providers, with unmatched capabilities in enterprise-scale AI, cloud, security, connectivity, data centers and application services. Our consulting and industry solutions help organizations and society move confidently and sustainably into the digital future. As a Global Top Employer, we have experts in more than 70 countries. We also offer clients access to a robust ecosystem of innovation centers as well as established and start-up partners. NTT DATA is part of NTT Group, which invests over $3 billion each year in R&D.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. Join our growing global team and accelerate your career with us.