Project Engineer BESS

We are looking for a Project Engineer - Battery Storage Systems (m/f/x) to join our team in Switzerland on a full-time basis, with a planned start in Q1 2027.

In this role, you will be responsible for the technical execution of battery energy storage projects from contract signature through installation, commissioning, and customer handover.

You will work closely with the Project Manager, customers, product team, suppliers, and contractors to ensure that Energy Vault’s battery storage systems are correctly engineered, integrated, installed, and commissioned in accordance with project requirements and Swiss standards.

The role combines electrical engineering, technical project coordination, documentation, and on-site support, with a particular focus on medium- and low-voltage interfaces, system integration, and construction readiness.

Key Responsibilities

• · Support battery storage projects from the engineering phase through commissioning and customer handover.
• · Act as the primary technical interface between the Project Manager, customer, internal product teams, suppliers, and contractors.
• · Define and coordinate the electrical integration of the battery storage system, including medium- and low-voltage interfaces.
• · Perform and/or review cable sizing, cable routing, grounding concepts, protection requirements, auxiliary systems, and electrical interfaces.
• · Prepare, review, and coordinate technical documentation including layouts, single-line diagrams, electrical schematics, cable lists, interface documents, and equipment specifications.
• · Review customer and contractor designs to ensure compatibility with Energy Vault equipment and project requirements.
• · Coordinate technical interfaces between batteries, PCS, transformers, MV switchgear, EMS/SCADA, auxiliary systems, and the customer’s electrical infrastructure.
• · Coordinate technical clarifications with engineering teams in Switzerland, the USA, and China.
• · Support procurement activities through technical evaluations, supplier clarifications, and review of equipment documentation.
• · Support installation readiness reviews and ensure that site electrical and civil interfaces are correctly prepared before equipment delivery.
• · Provide technical support during installation, testing, energization, and commissioning activities, including troubleshooting of electrical and automation systems and coordination with suppliers for the resolution of technical issues.
• · Participate in FAT, SAT, commissioning, performance testing, and customer acceptance activities.
• · Maintain accurate technical documentation and ensure that project documentation is updated to reflect final as-built conditions.