Staff Electrochemical Modeling Engineer

Twelve is pioneering a new industrial era with carbon transformation. We use electrochemistry to turn CO2 into critical products—fuels, chemicals, and materials—that today rely on fossil fuels. Our mission: to fundamentally change how the world makes its essential goods by transforming CO2 from a liability into a resource, building resilient, fossil-free supply chains, and advancing next-generation industry.

Twelve's Electrochemical Engineering team works at the frontier of CO2 electrolysis — pushing the limits of performance in commercially viable reactors. We're a small team of experimentalists and data scientists who carefully design experiments, execute rapidly, and value insight over volume.

We are seeking an electrochemical engineer with experience deconstructing complex problems into actionable hypotheses that deliver tangible understandings and solutions. You might accomplish this through quantitative modeling, through highly informative experimental design, or both — what matters is that your work clearly guides decisions about material choices, operating conditions, and cell architecture.

Strong, translatable electrochemical fundamentals matter most — battery, fuel cell, and water electrolysis scientists and engineers are encouraged to apply.

What you will do...

• Uphold high standards for laboratory safety and foster an environment where colleagues feel supported, challenged, and heard.

• Identify the performance and durability challenges that matter most to the company's strategic goals and frame them as testable hypotheses.

• Design the most informative path to an answer — whether that's deriving a multi-physics model, a targeted experimental plan, or both — so that every effort moves our understanding forward.

• Work cross-functionally with materials scientists, mechanical engineers, data scientists, and operations teams to carry out experimental work. Setting clear expectations of delegated tasks and timelines.

• Rigorously analyze results to draw statistically sound conclusions. Distill complex technical findings into actionable guidance for your peers, technical leadership, and external partners.

Who you are...

• You have deep, first-principles understanding of thermodynamics, kinetics, and transport in electrochemical reactors — and you fluently use it to frame your ideas and explain your observations.

• Your work has directly influenced the direction of hardware development, material selection, or experimental strategy. For example, you may have:

  • Developed mechanism-specific accelerated stress tests that isolated a dominant degradation mode

  • Built or adapted diagnostic techniques that revealed critical properties or processes previously unmeasured in a system of interest

  • Extracted actionable insights from large datasets that drove measurable improvements in device performance or reliability

  • Created a tailored multiphysics model that resolved a specific R&D problem

• You're fluent with coding and statistics — comfortable building models, automating analysis, and reasoning rigorously about uncertainty (parameter estimation, sensitivity analysis, uncertainty quantification).

• You communicate complex findings clearly enough to impact how others work, and you collaborate in a way that makes your peers strive for higher standards.

• You care about the physical and physcological safety of your colleagues as much as the quality of the science.

• You may have a PhD in Chemical Engineering, Materials Science, Chemistry, or a related field — or equivalent depth built through years of hands-on electrochemical R&D.

Twelve Benefits

• Medical, dental, and vision coverage

• Paid sick days and vacation

• Competitive salary and equity compensation commensurate with experience

• Diverse and inclusive work environment

At Twelve, it's important each employee is compensated competitively and fairly. In alignment with state legal requirements, Twelve conducts exhaustive research to understand compensation markets. A range for the included position is listed below. Be advised, actual offer details are determined by job category, job location, and candidate skill level.
United States Wage Range: $164,000 - $205,000

Please note that some pay bands may have wide ranges of compensation to accommodate candidate's diverse sets of skill levels.

We believe that the unique contributions of each individual is the driver of our success. To make sure that our products and culture continue to incorporate everyone's perspectives and experience we never discriminate on the basis of race, religion, national origin, gender identity or expression, sexual orientation, age, or marital, veteran, or disability status.

Want to work with us but don't see a current opening that fits your background? Submit a general application for Future Opportunities or email us at [email protected] for further inquiries.

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Twelve is committed to the full inclusion of all qualified applicants, and complies with federal and state disability laws.  As part of this commitment, Twelve will ensure that persons with disabilities are provided reasonable accommodations for the hiring process.  If reasonable accommodation is needed to participate in the job application or interview process, please contact our Talent team by email at [email protected].