A leading engineering company in the energy sector is developing advanced systems for deep geothermal drilling. The company focuses on designing and building complex mechanical systems that operate in extreme environments, combining hands-on development, prototyping, and full system ownership from concept to field deployment. The company is seeking a Senior Mechanical Engineer to take ownership of the design and development of large-scale drilling systems, working in a highly hands-on environment with end-to-end responsibility. Join us and help build the future of deep geothermal energy. Responsibilities Lead mechanical design of drilling systems Design large mechanical assemblies including energy transmission, thermal management, and fluid-flow systems Perform structural analysis and FEA Apply DFM principles and optimize for manufacturability and cost Plan and execute lab and field testing Work closely with multidisciplinary teams (thermal, RF, fluid) on system integration Coordinate with suppliers and manufacturers in Israel and abroad Maintain full engineering documentation throughout development cycles Support field validation activities at the company's testing sites, including periodic travel to the U.S. Requirements 5+ years of mechanical design experience Strong proficiency in SolidWorks or similar CAD tools Proven experience designing and building complex mechanical systems Ability to work independently in fast-moving, early-stage environments Willingness to travel periodically to the company's testing site in the U.S. as part of field testing and validation activities. Hands-on experience with hardware assembly and testing –