Senior Mechanical Engineer
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Before you apply
Salary$110k – $180k
LocationKearny, NJ
Work modeon-site
Typefull-time
SenioritySenior
Experience5+ yrs
DepartmentTechnology, Mechanical Engineering
EquityIncluded
Company size201–500 people
PostedOct 8, 2026 · 4w ago
Verified live2d ago
At a glanceSummarised by Seekless from the posting.
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
Equal opportunity employer - all qualified applicants receive consideration 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
Skills
Solidworks
CATIA
NX
Ansys
COMSOL
GD&T
Benefits
Health insurance
Dental insurance
Vision insurance
Employee equity
PTO
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
Company Benefits:
•
Salary Range $110,000 - $180,000
•
Comprehensive health benefits (e.g. medical/dental/vision)
•
Employee equity stock options
•
20 days PTO
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.