Senior Mechanical Design Engineer

Wallingford, CT, 

United States

Are you passionate about the energy transition? Join us.

Hydrogen… the most abundant element in the universe is your ticket to a rewarding future. Every day there are reports of how hydrogen (produced by water electrolysis and renewable energy sources) is displacing fossil fuels, reducing greenhouse gasses, and helping to revitalize our planet.

Nel Hydrogen is the global leader in on-site hydrogen generation and the largest electrolyser manufacturer in the world. Armed with a full portfolio of water electrolysers and hydrogen fueling station technologies, Nel Hydrogen is leading the charge into the new green hydrogen economy.

If you are driven by personal initiative combined with loyalty and commitment to your team and the ability to convert complex issues into simple solutions, then we want to talk to you. Help make the world a better place. Join a company that is on the cutting edge of new energy innovations, with an energized, progressive culture.

About the position

An immediate opportunity exists for a qualified candidate to participate in the product design and development of large-scale hydrogen generators. The large-scale products have recently been introduced to the market with the development of cost reduced and larger scale products under way. This position requires a mechanical engineer with a strong background in mechanical design and a broad knowledge of mechanical engineering fundamentals to participate in the design of these systems.


  • Develop, design, and select components for liquid and gas system assemblies, including fabrication requirements.
  • Prepare and maintain internal components procurement specifications, P&ID, bills of materials, drawings, and documentation.
  • Development of specifications for vendor designed / fabricated hardware with follow-on shop inspections of equipment.
  • Develop general arrangement layouts of equipment and support site construction design details.
  • Collaborate with other departments such as cell stack design, manufacturing/fabrication, and equipment vendors to ensure proper system integration.
  • Select and integrate components and sub-systems to meet overall project/product specifications and cost requirements.
  • Design for compliance to various industry standards (US and international).
  • Provide system or sub-system technical direction overseeing testing, validation, and test reporting.
  • Support manufacturing team, as needed, to maintain actively produced equipment.
  • Model or define parameters for analyses for mechanical strength, shipping/installation forces, etc. utilizing commercially available analysis tools.
  • Develop and support critical engineering-driven product documentation such as design files, installation, operation and maintenance manuals, hazard evaluations, etc.
  • Support the project implementation team, including evaluation of customer requests and installation/operation feedback.
  • Mentoring of Junior Mechanical Engineers.



Bachelor’s degree in Mechanical Engineering or related field.

Required skills and abilities

  • 7-10 years of industry related experience (Hydrogen systems (preferred), chemical processing, gas and liquid delivery, or water treatment systems).
  • Experience with 3D CAD software including solid modeling (preferably with PTC Creo).
  • Understanding of sub-system operational characteristics and potential interactions that influence overall product/system performance.
  • Motivated self-starter with high level of initiative and creative approach to problem solving.
  • Excellent verbal and written communication skills.
  • Strong organizational skills and ability to balance multiple tasks.
  • Capable of working well in a multi-disciplinary team environment with high degree of collaboration.
  • Ability to develop, plan and implement short- and long-range tasks.
  • Limited travel could be required to vendor or customer sites.

Preferred skills and abilities

  • New Product Introduction experience preferred.
  • Commercial products or plant design experience preferred.
  • Experience with finite element analysis (preferably with PTC CREO Simulate); computational flow dynamics (CFD) experience is a plus.
  • Experience working with electromechanical devices is a plus.
  • Strong working knowledge of Microsoft Office; familiarity with ERP is a plus.


  • Attention to Detail/Accuracy
  • Problem Solving Skills
  • Communication
  • Time Management; priority goals
  • Critical Evaluation
  • Relationship Management
  • Consultation
  • Ethical Practice


  • Nel will only employ those who are legally authorized to work in the United States. This is not a position for which sponsorship will be provided.
  • Individuals with temporary visas such as E, F-1, H-1, H-2, L, B, J, or TN or who need sponsorship for work authorization now or in the future, are not eligible for hire.

Equal opportunity employer

Nel is an equal opportunity employer and all qualified applicants will receive consideration for employment regardless of race, colour, religion, sex, national origin, disability status, protected veteran status, or any other characteristic protected by law. All employment is decided based on qualifications, merit, and business need.


To apply, please follow these steps:

  1. Download and complete this application.
  2. Email the completed application, your resumé, and a cover letter to

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