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Senior Mechanical Engineer

Thea Energy - Kearny, NJ, United States - In-office - posted 2026-10-08

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Thea Energy is developing next-generation fusion energy technology based on stellarator physics breakthroughs. The company is commercializing a novel approach using computer-controlled planar coil arrays to replace complex modular magnets, aiming to create a zero-emission, limitless energy source. In this Senior Mechanical Engineer role, you will own the design and development of primary and secondary mechanical fusion components and subsystems. You will work cross-functionally with core system-level development teams to define prototyping requirements and produce mechanical engineering designs, drawings, specifications, and parameters from first principles with appropriate tolerances for vendor quoting and manufacturing. Key responsibilities include: - Design and develop mechanical fusion components and subsystems with full ownership - Collaborate with system-level teams on prototyping requirements - Create detailed mechanical designs, drawings, and specifications suitable for manufacturing - Design assembly tooling - Perform thermal, structural, and electromagnetic analysis using Ansys and COMSOL - Apply design-for-manufacturing principles and support first builds - Implement tooling and manufacturing processes - Design and execute qualification testing - Track progress against program goals and milestones - Mentor junior engineers on problem decomposition and design review - Communicate and collaborate with internal and external stakeholders This is a hands-on role in a fast-paced, rapidly evolving environment where you will guide complex component and system design while working to aggressive deadlines. REQUIREMENTS: - Bachelor's degree in mechanical engineering, aerospace engineering, physics, or related field (minimum) - Minimum 5 years of professional experience - Extensive experience as a lead designing, building, and commissioning custom systems - Proficiency with CAD software (Solidworks, CATIA, NX, or equivalent) - Experience managing complex assemblies with multiple contributors - Experience specifying machining, welding, and/or fabrication requirements - Ability to mentor junior engineers in decomposing complex problems and reviewing their work - Ability to take initiative and guide design and analysis of complex components and systems - Familiarity with GD&T (ASME Y14.5) and drawing standards - Experience owning systems or complex sub-systems - Strong communication and collaboration skills - Ability to execute in fast-paced, rapidly changing environments - Comfortable working to aggressive deadlines Note: The posting indicates it is not necessary to meet all skillsets listed; candidates are encouraged to explain why they would be a strong fit even if some experience gaps exist.

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