NextGenEnergyJobsModern Power System Jobs

Senior Geochemical Modeler

Fervo Energy

Golden, CO

Full Time

Posted November 6, 2026

$138k - $210k

Energy Management

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Listing evidence and provenance

Source: Greenhouse View original listing
Freshness: Open in the current public read path; this is not an employer guarantee.Last observed November 7, 2026
Classification: Modern power-system classification not yet published for this listing.Legacy source industry field: Energy Management
Pay provenance: Employer-provided pay

Job Description

We are seeking a Senior Geochemical Modeler to develop and apply advanced geochemical and reactive transport models to support the design, development, and long-term operation of Enhanced Geothermal Systems (EGS).

Key Responsibilities

Geochemical and Reactive Transport Modeling
Develop and execute reactive transport models to predict fluid chemistry evolution during reservoir circulation, injection, production, and thermal recovery.
Apply thermodynamic equilibrium, aqueous speciation, mineral dissolution and precipitation kinetics, and temperature-dependent reaction rates to evaluate water–rock interactions.
Use professional geochemical modeling tools, particularly TOUGHREACT and Geochemist’s Workbench (GWB), to evaluate mineral saturation, secondary mineral formation, and potential changes in reservoir porosity and permeability.
Evaluate the effects of temperature, pressure, fluid composition, and residence time on mineral reactions and fluid chemistry.
Water–Rock Interaction and Model Calibration
Interpret core, cuttings, XRD, XRF, petrographic, and other mineralogical analyses to characterize reservoir lithology and define representative mineral assemblages.
Incorporate actual rock composition, injection-fluid chemistry, and produced-water analyses into numerical models.
Calibrate model predictions against observed fluid chemistry, including major ions, alkalinity, silica, trace elements, and pH.
Refine reaction networks, kinetic parameters, reactive surface areas, and mineral assemblages to improve agreement between modeled and observed chemistry.
Perform sensitivity analyses and quantify uncertainty in key geochemical predictions.
Integration with Reservoir Simulation
Integrate geochemical models with three-dimensional reservoir simulation workflows used by Fervo, including ResFrac and other applicable numerical modeling platforms.
Incorporate reservoir flow, mass transport, temperature, pressure, residence time, and thermal evolution assumptions into reactive transport simulations.
Collaborate with reservoir engineers and geologists to evaluate coupled thermal, hydraulic, and geochemical processes and their implications for long-term reservoir performance.
Scaling, Corrosion, and Non-Condensable Gas Risk
Assess mineral scaling risks associated with carbonate, sulfate, silica, and silicate minerals during production, heat extraction, pressure changes, and reinjection.
Evaluate fluid chemistry conditions that contribute to corrosion, including pH, dissolved oxygen, H₂S, CO₂, chloride concentration, and relevant aqueous species.
Predict dissolved gas behavior and potential NCG release, including CO₂, H₂S, and N2 where relevant, during production, flashing, pressure reduction, and surface processing.
Translate modeling results into actionable recommendations for chemical treatment, materials selection, fluid handling, reinjection strategy, and geochemical monitoring.

Requirements

Experience in geothermal energy, EGS, oil and gas, or other high-temperature subsurface environments.
Familiarity with ResFrac or other three-dimensional reservoir simulators and integration of mass and heat transport outputs with geochemical models.
Experience evaluating scaling, corrosion-related geochemistry, and dissolved gas partitioning.
Proficiency in Python, MATLAB, or similar scientific computing tools for data processing, model automation, and sensitivity analysis.
Familiarity with field sampling, produced-water chemistry, and mineralogical characterization.

Benefits & Perks

Fervo offers a comprehensive benefits package designed to support your health, financial well-being, and life outside of work. Benefits for eligible employees include:
Medical, dental, and vision plan options
Employer-paid basic life insurance and short-term and long-term disability coverage
A 401(k) plan with up to 6% match
Flexible paid time off and paid parental leave
Family-building, fertility, hormonal health, pregnancy, postpartum, and parenting support through Carrot
A dependent care FSA for eligible child and elder care expenses
An annual Lifestyle Spending Account for eligible wellness expenses, including fitness, financial planning, pet insurance, and pet care
Employee ownership opportunities through Fervo’s Employee Stock Purchase Program, as well as LTI and bonus opportunities for eligible roles
Benefits and programs are subject to eligibility requirements and may change.