N&T Network Designer

Act as the Subsystem Leader for Network & Telecom (N&T), assuming full technical responsibility for the subsystem. The role covers all activities from network architecture definition and project documentation generation to advanced logical configuration of network and telecommunications equipment.

• Elaborate N&T Backbone Transmission Network (BTN) Design specifications (Preliminary Design & Detailed Design) in line with N&T Engineering rules and relying on best practices inherited from previous projects (cross reviews with installation teams, cybersecurity teams, power experts…)
• Ensure that all N&T BTN Design elaboration follows Quality processes, including application of Adapt and Design N&T Processes, Methods and Guidelines
• Ensure that BTN Design documents remain in line with project DFQ Gate Reviews milestones and are elaborated as per project Documentation plan
• Minimize, by Design, the N&T BTN deployment cost, lead time and risks
• Develop and elicit BTN Design requirements in line with project needs (internal & external), with a specific focus on BTN dimensioning and Cybersecurity concerns
• Check that external interfaces are consistent with N&T sub-system
• Contribute to project addressing plan elaboration with Project System teams
• Prepare & Execute technical room (Switching Equipment Rooms) surveys
• Elaborate N&T BTN BoQ, including Design elaboration of BTN cubicles
• Prepare and participate in Design Reviews
• Maintain close follow-up on technical gaps implementation (BTN related)
• Manage technical issues identified on BTN part
• Open and follow technical Change Requests to Product Engineering teams in charge of N&T products and solutions
• Participate to the support of the functional validation phase of the sub-system (FIVP) for BTN part
• Participate upon request, to Installation & T&C activities support activities in order to validate E2E performance, including support to troubleshooting tasks
• Collect and consolidate Return of Experience (REX) to Product Engineering teams and to N&T Project Engineering teams
• Provide iteration of the installation studies specific to N&T sub-system for BTN part
• Provide iteration of the BTN and Radio configuration files all along project life cycle till end of warranty period,
• Remain in constant contact with Project N&T Design Leader all along the project life cycle regarding progress of BTN Design activities
• Promote the Alstom Code of Ethics and adhering to the highest standards of ethical conduct.

Mandatory Skills

Network Engineering and Protocols

• Solid command of the TCP/IP stack and essential protocols: UDP, ICMP, ARP, DHCP, DNS, HTTP/HTTPS, and SNMP.
• Routing and Switching: BGP, OSPF, VLANs (802.1Q), STP/RSTP/MSTP.
• Critical Services: NTP, IGMP, and QoS.
• Knowledge of NAT (Static, Dynamic, and PAT) and Redundant Networks (Failover/High Availability).

Optical Infrastructure and Backbone

• Strong knowledge of backbone architecture and high-capacity networks.

Wireless Technologies

• Proven experience with Wi-Fi in the 2.4 GHz and 5.8 GHz frequency bands.
• Coverage planning and interference mitigation.

Monitoring and Systems

• Zabbix: installation, configuration, template creation, triggers, and dashboards.
• Linux: basic system administration and network services.
• Troubleshooting: advanced use of Wireshark and diagnostics of latency and packet loss.

Technical Management

• Development of project documentation and network architecture.
• Requirements management and customer technical interface.

Desirable Skills

• Virtualization - Knowledge of virtual environments (e.g., VMware, Hyper-V) for hosting Linux/Zabbix servers.
• Network Security - Configuration of Firewalls, VPN (IPSec/SSL), and ACLs.
• Automation - Scripting in Bash or Python.
• Railway Knowledge - System-level understanding of telecommunications and signaling interfaces (Interlocking, ATS, ATC, ATO) to ensure proper subsystem integration.

Qualifications & Experience

• Bachelor’s degree in Computer Science, Telecommunications, Electrical Engineering, or related field.
• Strong communication and interpersonal skills; problem-solving and critical-thinking abilities; analytical mindset; teamwork skills.
• Previous experience: Experience in radio system design and network design, including execution, configuration and installation of platforms;
• Language skills: Fluent English; intermediate Spanish.
• Occasional Travel required

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