We are looking for **MECHANICAL SYSTEMS ENGINEERS** to join our Madrid office, collaborate on power plant projects (mainly biomass), and have the possibility of site relocation during project execution. **Job Responsibilities/Functions:** As part of the mechanical engineering team working on power generation projects (combined cycles, thermal plants, cogeneration, biomass, etc.), you will perform the following duties: * Development of piping and instrumentation diagrams (P\&ID) and process flow diagrams for fluid systems. * Hydraulic calculations for mechanical systems. * Sizing of mechanical equipment and preparation of associated data sheets. * Preparation of system descriptions, functional test procedures, and operation instructions. * Support during construction and commissioning phases. **Requirements:** * Education: Industrial Engineer or Master's in Industrial Engineering, or equivalent. * More than 2 years of experience in basic engineering of main/auxiliary systems in electrical power generation projects. * Knowledge of Intergraph SmartPlant PID will be valued. * English, minimum level B2\. * Availability to relocate to site offices during construction and commissioning. **We Offer:** * Permanent contract directly with EAG. * Attractive remuneration package: fixed salary \+ variable pay. * Language allowance. * Continuous training (extensive internal catalog). * Free English and/or French classes with native teachers. * Life insurance. * Childcare assistance. * Flexible compensation solutions (transport card, childcare voucher, etc.). * Discount on private health insurance.