Modeling and Simulation Engineer

Modeling and Simulation Engineer, Reactor and Process Development

Senior and above)

About Ammobia

Ammobia is on a mission to revolutionize the ammonia industry. We are a seed-stage startup developing Haber Bosch 2.0 – a next-generation ammonia synthesis process enabling cost-effective, clean ammonia production.

Until now, ammonia production has been a highly polluting, steady-state, high inertia process. We are building new regimes of physics and plant design that require dynamic processes, especially for ammonia production from intermittent renewable energy sources.

Clean ammonia will support ammonia’s growing role in our decarbonized world, tackling some of the most difficult to abate sectors including chemicals, fertilizers, and heavy-duty transportation. We are supported by leading climate tech organizations including Starlight Ventures, the Department of Energy, Collaborative Fund, Third Derivative, and more.

Job Description

Ammobia is seeking a motivated and creative Modeling and Simulation Engineer to develop and optimize catalytic reactor and plant process models. You will push forward our reactor simulation efforts as we scale our reaction process from pilot to commercial scales. This role involves building and refining models, integrating experimental data, and optimizing reactor and process performance for real-world applications. You will interface directly with experimentalists, equipment, materials, and process engineers and contribute to technical development across the company. There is significant opportunity to grow your role alongside the company.

• Build and refine dynamic reactor models incorporating reaction kinetics, heat and mass transfer, and thermodynamic principles
• Design and optimize chemical process flows, incorporating reactor model outputs and novel separations processes
• Develop control strategies, system integration, and optimization techniques
• Collaborate with process engineers and experimental teams to refine model assumptions and validate model accuracy
• Analyze simulation results and provide insights through technical reports and presentations

Who you are

You are a creative, data driven problem solver who works from first principles. You enjoy fast paced, creative, and collaborative work; you work with a bias towards action and overcommunication; and you thrive with high levels of autonomy and ownership.

Successful applicants will have most of the following

e.g., in MATLAB, gPROMS, Cantera, Python, or similar

e.g. in Aspen, gPROMS, Aveva, or similar.

Nice-to-have

Who we are

We are a small and passionate team of scientists and engineers. We value teamwork, accountability, open communication, and rapid iteration. We emphasize career growth, mutual feedback, and a fun and exciting working environment. Check out ammobia.co / careers for our full values statement and ammobia.co / team to learn more about us.

The position is full-time and in-person in San Francisco, CA. Compensation and job title will be commensurate with experience.

Benefits include :

To apply, please submit your resume at