Senior Mechanical Engineer

thea.energy· Mechanical Engineering
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📍 Kearny, NJFull time💰 USD 110K–180K

About this role

About Thea Energy:  
Thea Energy is leveraging recent breakthroughs in stellarator physics and engineering to create a faster and simpler approach to commercializing fusion energy. The company is reinventing the stellarator using computer-controlled arrays of planar coils thereby replacing the intricate, complex modular magnets required in all other stellarator architectures. Thea Energy is on a mission to create a limitless source of zero emission energy for a sustainable future.
 
Position Overview:

Thea Energy is looking for experienced, highly motivated mechanical engineers to join its rapidly growing team. Mechanical engineers will have ownership of the mechanical design and development of primary and secondary components and subsystems in the development of Thea Energy’s stellarator fusion systems. You will be responsible for structural and thermo-mechanical design, manufacturability, development, and commissioning of these systems. The Thea Energy team is comprised of driven, creative, and fun individuals passionate about solving complex problems.

Key Responsibility Areas:

  • Have ownership of the design and development of primary and secondary mechanical fusion components and subsystems
  • Work with core system-level development teams to define prototyping requirements
  • Produce mechanical engineering designs, drawings, specifications, and parameters from first principles with appropriate tolerances for vendor quoting and manufacturing
  • Design tooling for assembly
  • Perform thermal, structural, and electromagnetic analysis and simulation using Ansys and COMSOL
  • Incorporate design for manufacturing principles and support first builds
  • Support the implementation of tooling and manufacturing
  • Design and execute qualification testing
  • Track and report results and progress against program goals and milestones
  • Communicate and collaborate with internal and external stakeholders
  • Mentor junior engineers

Ideal Experience & Skillsets:

  • Minimum of a bachelor’s degree in mechanical engineering, aerospace engineering, physics, or related fields
  • Minimum of 5 years of experience
  • Extensive experience as a lead designing, building, and commissioning custom systems
  • Experience in mechanical engineering using CAD software (e.g. Solidworks, CATIA, NX, etc.)
  • Management of complex assemblies with multiple contributors
  • Experience specifying machining, welding, and/or fabrication requirements
  • Ability to mentor junior engineers in methods to decompose complex problems, and review that work
  • Ability to take initiative and guide the design and analysis of complex components and systems with the aid of peers and team members
  • Ability to execute and flourish in a fast-paced, rapidly changing environment
  • Familiarity with GD&T (ASME Y14.5) & Drawing Standards
  • Experience owning systems or complex sub-systems
  • Comfortable working to aggressive deadlines
  • Exceptional work ethic
  • Strong team member with clear communication and collaboration skills
  • Innate desire to learn, innovate, and critique ideas including one’s own
It’s not necessary to meet all of the skillsets outlined above. Please feel free to send us a note and tell us why you would still be a great fit for this role or Thea Energy.
 
 
Diversity and Inclusion:
Thea Energy is an equal opportunity employer committed to creating a company of diverse backgrounds. By creating a diverse environment, we will bring new ideas and approaches to solving some of the world’s hardest (and most important) problems. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, gender, sexual orientation, gender identity or expression, national origin, family or marital status, age, disability, veteran’s status, or other characteristic protected by applicable laws and regulations.

Frequently Asked Questions

What is the salary for the Senior Mechanical Engineer role at thea.energy?
The listed salary for this Senior Mechanical Engineer position at thea.energy is USD 110K–180K. This is an Full time role.
Where is the Senior Mechanical Engineer position at thea.energy located?
This Senior Mechanical Engineer role at thea.energy is based in Kearny, NJ. The position is listed as on-site or hybrid. Check the full job description or apply directly to confirm the work arrangement.
Is the Senior Mechanical Engineer role at thea.energy full-time or part-time?
This is listed as a Full time position. It is posted as a Senior Mechanical Engineer role in the Mechanical Engineering department at thea.energy.
Which team or department does the Senior Mechanical Engineer at thea.energy belong to?
This Senior Mechanical Engineer position is part of the Mechanical Engineering department at thea.energy. See the full job description for more information about the team structure and responsibilities.
How do I apply for the Senior Mechanical Engineer position at thea.energy?
Click the "Apply Now" button on this page. You will be redirected to thea.energy's official application portal hosted on lever where you can submit your application directly.
When was the Senior Mechanical Engineer job at thea.energy posted?
This Senior Mechanical Engineer position at thea.energy was posted on Oct 8, 2026. Apply as soon as possible — early applications are often reviewed first.
Senior Mechanical Engineer
thea.energy · 💰 USD 110K–180K
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