Reservoir Engineer

Our mission is to return the atmosphere to 280 ppm CO₂. We convert excess inedible biomass into carbon-rich bio-oil and inject it into underground storage for permanent carbon removal. At scale, we can use bio-oil to make fossil-free iron.

Our mission is to return the atmosphere to 280 ppm CO₂. We convert excess inedible biomass into carbon-rich bio-oil and inject it into underground storage for permanent carbon removal. At scale, we can use bio-oil to make fossil-free iron.

Our carbon removal efforts began in 2020 with initial purchases from customers like Stripe, Shopify, and Microsoft. Since then, we’ve scaled to thousands of tons of carbon removal, grown to over a hundred employees, and established three locations in San Francisco, Colorado, and Louisiana.

We're expanding our team of ambitious, creative, and hands‑on problem solvers. We value psychological safety, collaboration, and continuous learning. We take calculated risks and treat mistakes as opportunities to improve. If you're excited about tackling big challenges, we encourage you to explore our company values.

Come help us reverse climate change. Gigatons or bust!

Charm is looking for a Reservoir Engineer. Successful bio‑oil sequestration requires a deep understanding of the reservoir: how much we can inject, at what pressure, for how long, and whether we can prove confinement and compatibility with regulators. This role owns that technical story end to end - from the reservoir engineering that tells us how our wells will behave, to the UIC permit applications that will help us bring more wells online.

This is a hands‑on role for an engineer who wants to do both halves of the job. On the subsurface side, you'll build and maintain the injection strategy, reservoir models and forecasts that guide where and how we inject. On the permitting side, you'll draft and steward our Class V UIC applications - turning your own reservoir analysis into permit‑ready narratives that stand up to scrutiny.

Efficient permitting keeps long‑term injection operations from ever being roadblocked, and doing it well requires someone who understands the subsurface deeply enough to defend it.

You’ll partner closely with our subsurface, land, operations and MSE (Materials science & engineering) teams.

• Draft, assemble, and steward Charm's Class V UIC permit applications for EPA regional and state programs in collaboration with other members of the development team.
• Translate reservoir engineering work directly into permit-ready technical narratives, and lead the response to regulator questions and deficiency letters.
• Coordinate with Charm’s Head of Development and subsurface consultants to keep applications moving on schedule so that Charm’s injection operations are never roadblocked by regulatory timelines.
• Develop and maintain relationships with key state, regional and federal regulators

• Monitor subsurface reservoir response to ongoing injection using pressure data, tracer surveys, and formation logs, identifying anomalies early.
• Build and maintain analytical tools that track injection performance, flag pressure deviations, and forecast potential reservoir problems.
• Analyze reservoir behavior to optimize injection rates, protect formation integrity, and prevent unintended fluid migration to shallower zones.
• Partner with Charm’s Head of Injection Development and the MSE team on designing and executing high‑impact subsurface studies including formation characterization, reservoir modelling inputs, and other laboratory projects.
• Evaluate opportunities to improve injection efficiency or expand the injection footprint as new sites come online.
• Design data collection…