Mechanical Design Engineer, CO2 Electrolyzer Systems

Oxylus Energy; Branford (CT); On-site; USD 90,000 - 110,000; Full time

Benefits offered by this job

Competitive salary

Medical, dental, and vision coverage

Paid sick days and vacation

401k match

Diverse and inclusive work environment

Job summary

Oxylus Energy is seeking a Mechanical & Design Engineer II–III to own the mechanical design of the CO₂ electrolyzer from cells to stacks. You will translate electrochemical requirements into robust, manufacturable hardware, covering flow fields, seals, manifolds, and balance-of-stack components.

This hands-on role involves building and testing hardware, working with R&D and engineering teams to diagnose issues and improve performance, durability, and scalability.

Qualifications

• Bachelor's degree in Mechanical Engineering or related field.
• Engineer II: 2–4 years experience; Engineer III: 4+ years or PhD with limited experience.
• Proficient in 3D CAD and GD&T for manufacturing drawings.
• Hands-on experience with CFD tools (e.g., ANSYS Fluent or COMSOL).
• Familiarity with electrochemical hardware development (electrolyzers, fuel cells, batteries).
• Experience building and testing mechanical prototypes.
• Understanding of sealing, compression, and fluid-containing vessels.

Responsibilities

• Own the mechanical design of CO₂ electrolyzer cells and stacks.
• Design and specify all mechanical balance-of-stack components.
• Use CFD to model gas/liquid flow, pressure drop, and heat transfer.
• Produce CAD models and manufacturing drawings with GD&T.
• Select materials for chemical compatibility and performance.
• Design and build prototype cells and stacks; run leak and pressure tests.
• Diagnose hardware failures and implement design fixes.
• Collaborate with machine shops and suppliers for fabrication and qality.

Skills

3D CAD proficiency

CFD experience

Hands-on prototyping

Detail-oriented

Communication skills

Problem solving

Sealing/pressure vessels

Education

B.S. in Mechanical Engineering or related field

Tools

SolidWorks/Creo/NX

ANSYS Fluent/COMSOL

Job description

Oxylus Energy is seeking a Mechanical & Design Engineer II–III to own the mechanical design of the CO₂ electrolyzer from cells to stacks. You will translate electrochemical requirements into robust, manufacturable hardware, covering flow fields, seals, manifolds, and balance-of-stack components.

This hands-on role involves building and testing hardware, working with R&D and engineering teams to diagnose issues and improve performance, durability, and scalability.