Senior Mechanical & Design Engineer — Electrolyzer Systems

Oxylus Energy; Branford (CT); On-site; USD 115,000 - 135,000; 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 Senior Mechanical & Design Engineer to own the mechanical design of our CO₂ electrolyzer from cells to stacks. You will transform electrochemical requirements into robust hardware, including flow fields, manifolds, seals, and connections.

This is hands-on work with CAD, testing, and design iteration. You will lead design reviews, mentor engineers, and collaborate with R&D and suppliers to scale hardware for pilot and production, while ensuring manufacturability and

Qualifications

• Degree in Mechanical Engineering with relevant experience.
• Proficiency in 3D CAD and GD&T for manufacturing drawings.
• Experience with CFD tools to model flow, heat transfer and pressure drop.
• Hands-on experience building and testing mechanical prototypes.
• Familiarity with electrochemical hardware development (electrolyzers, fuel cells, batteries).
• Ability to work with machine shops and suppliers on fabrication.

Responsibilities

• Own the mechanical design of CO₂ electrolyzer cells and stacks.
• Design and specify all mechanical balance-of-stack components.
• Use CFD to optimize flow-field and manifold designs.
• Produce CAD models and manufacturing drawings with GD&T.
• Select materials for chemical compatibility and electrical/thermal performance.
• Build and test prototype cells and stacks; run leak tests.
• Diagnose hardware issues and implement design fixes.
• Collaborate with shops and suppliers for fabrication and QA.
• Contribute to safety reviews for pressurized/hazardous gases.
• At Senior level, set technical direction and mentor engineers.

Skills

3D CAD

CFD

GD&T

Prototype build

Electrochemical hardware

Manufacturing drawings

Sealing and compression

Problem solving

Education

B.S. Mechanical Engineering

M.S. Mechanical Engineering

Ph.D. Mechanical Engineering

Tools

SolidWorks

Creo

NX

ANSYS Fluent

COMSOL

Job description

Oxylus Energy is seeking a Senior Mechanical & Design Engineer to own the mechanical design of our CO₂ electrolyzer from cells to stacks. You will transform electrochemical requirements into robust hardware, including flow fields, manifolds, seals, and connections.

This is hands-on work with CAD, testing, and design iteration. You will lead design reviews, mentor engineers, and collaborate with R&D and suppliers to scale hardware for pilot and production, while ensuring manufacturability and