Staff Electrochemical Modeling Engineer

Twelve•Berkeley, CA

About The Position

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.

Requirements

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.

Responsibilities

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.