25 kV Power Supply Design Engineer (H/F)

SYSTRA is an international engineering and consulting group dedicated to public transport and sustainable mobility. 

For the past 65 years, the Group has been working alongside cities and regions to support their development through the design, enhancement, and modernization of transport infrastructure and systems. SYSTRA delivers expertise across the entire project lifecycle, from design to testing, commissioning, deployment, and maintenance, in France and internationnally. Through its expanded range of services, SYSTRA support its clients and partners in their digital, environmental, and energy transitions, shaping the sustainable mobility solutions of the future. 

Context

The “25 kV Power Supply Design Engineer” is responsible for the engineering, design, analysis, and technical coordination of 25 kV traction power supply for Railway Systems projects (High Speed Rail, Conventional Rail, Technicentres). The role focuses on the development of traction electrification infrastructures, including 25 kV AC and 2x25 kV autotransformer systems.

The purpose of the role is to deliver high-quality engineering studies and detailed design for traction power supply systems in accordance with project requirements, international railway standards, safety regulations, and client specifications.

The position requires expertise in railway electrical engineering, traction substations, SCADA interfaces, protection systems, earthing and bonding, and integration with railway operational requirements. The Design Engineer will work within multidisciplinary and international project teams throughout feasibility, preliminary design, detailed design, procurement support, construction support, testing, and commissioning phases.

Missions/Main Duties

Traction Power Supply System Design :

• Design of 25 kV AC and 2x25 kV traction power systems including functional and requirements specifications
• Development of traction power supply architecture including feeding and sectioning diagram
• Definition and sizing of Traction Substations, AT Posts, Switching Stations, Sectioning Posts, and Paralleling Posts
• Elaboration of single-line diagrams, Substation layout drawings, cable routing, equipment specifications, and Bill of Quantities (BoQ)
• Design and sizing of LV Auxiliary Power Supply, Energy SCADA and Remote Control System
• Coordination of interfaces with Civils, Overhead Contact System (OCS), SCADA, signaling, telecom, rolling stock systems, and System Integration team
• Contribution to FAT/SAT Procedures, As-Built Documentation 

Electrical Design & Calculations :

• Load flow studies and traction power simulations analysis
• Short-circuit calculations, Voltage drop analysis
• Harmonic and power quality studies
• Earthing & Bonding and Return Current System design
• Electromagnetic compatibility (EMC)
• Protection coordination, interoperability compliance and RAMS assessment
• Ensure compliance with EN, IEC, UIC, and local railway standards

Interface and Coordination :

• Technical coordination with multidisciplinary engineering teams
• Management of interfaces with utility companies and grid operators
• Participation in technical workshops with clients and stakeholders
• Contribute to hazard analysis and risk mitigation measures
• Monitor engineering progress and technical risks. 

Profile/Skills

Education : Master’s degree in Electrical Engineering, Power Systems Engineering, Railway Engineering, or equivalent;

Years of Experience: Minimum 3 years of experience in railway electrification or traction power supply engineering

• Proven experience in High Speed Rail, Mainline or Conventional Rail projects
• Experience with 25 kV AC and/or 2x25 kV traction systems

Skills and Competencies :

• Knowledge of traction power system architecture and railway electrification principles and standards
• Ability to perform electrical calculations and system studies
• Understanding of railway operational constraints and interfaces
• Knowledge of protection systems, SCADA, and control systems
• Familiarity with EMC, grounding, and return current concepts
• Strong technical writing and reporting skills

• Excellent communication and interpersonal skills

• Strong teamwork and collaboration capabilities

• Software & Tools : ETAP, AutoCAD, Revit, MS Office Suite; 3D Modelling in BIM environments is considered an advantage
• Languages : English and French are mandatory

SYSTRA is committed to diversity and inclusion and actively promotes the employment of people with disabilities.