We are looking for a **NUCLEAR SYSTEMS ENGINEER** to join the Mechanical Engineering team at the **Trillo Nuclear Power Plant** (Guadalajara). **Responsibilities/Job Functions:** * Design modifications of nuclear and conventional systems. * 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. * System descriptions, functional test procedures, and operation instructions. **Requirements:** * Bachelor's or Master's degree in Industrial Engineering or equivalent. * A Master’s in Nuclear Energy or the MINA Master from CIEMAT/UAM is desirable. * Knowledge of nuclear regulations is desirable. * Experience in engineering of main and auxiliary systems in power generation plants, including preparation of technical specifications, detailed system engineering, hydraulic calculations, flow diagrams, bid evaluations, etc., is desirable. * Minimum English level B2; other languages are an advantage. * Availability to work initially at the central office in Madrid for the training period (approximately 2\-4 weeks). **We Offer:** * Indefinite contract directly with EAG. * Attractive remuneration conditions: fixed salary \+ variable pay. * Continuous morning working hours, except during refueling periods (approximately 4\-5 weeks/year). * Up to 2 days of teleworking per week after an initial integration period, except during refueling periods. * Language allowance. * Free bus service from Guadalajara, with multiple stops throughout the city. * 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.