Rondo Energy's mission is to eliminate 15% of global CO2 emissions in 15 years. To accomplish this mission, Rondo is deploying low-cost, zero-carbon Rondo Heat Batteries to accelerate the deployment of renewable energy and to significantly decarbonize industrial processes that are commonly thought of as 'difficult-to-decarbonize'. Our Heat Batteries charge from intermittent renewables to provide high temperature, continuous heat for customers safely, reliably, at an unprecedented 98% efficiency - and at a cost point that is lower than any other method. We are seeking a Systems Modeling Engineer to build one dimensional models of heat batteries and supporting systems. You will be responsible for coding, validating, optimizing, and using 1D models to enable controls development, inform product design, and optimize operation. Join our team, and together we can reduce global CO₂ emissions by 1% in 10 years, and by 15% in 15 years!