Lead Reservoir Engineer

Quaise Energy is unlocking Earth’s deep heat to deliver clean, reliable, baseload energy at scale – almost anywhere in the world. As both a technology innovator and project developer, Quaise builds and operates solutions that harness superhot geothermal energy far below the surface, enabling power generation that can rival the output of today’s most efficient fossil fuel and nuclear plants. Leveraging millimeter wave drilling, developed after more than a decade of research at MIT, Quaise’s mission is to make superhot geothermal a backbone of the modern energy system, offering affordable, zero-carbon power and true energy independence for communities and nations everywhere.

The Lead Reservoir Engineer will carry out reservoir design, fracture modeling, diagnostics design and reservoir parameter testing with a focus on delivering required reservoir characteristics for Enhanced Geothermal Systems (EGS) development. This role is responsible for working within the Resource & Operations team to transform analytical reservoir models into field-executable reservoir design concepts. This role will evaluate reservoir modeling and lead efforts to test the uncertainties in those models.

This role will work closely with drilling, completions, power plant design, and exploration geology.

Essential functions (Reasonable accommodations may be made to enable individuals with disabilities to perform these essential functions.)

Reservoir Engineering Ownership

• Lead reservoir simulations to evaluate design scenarios, completions hardware and power plant design criteria.
• Advise Resource & Operations teams on the design and objectives of diagnostic programs, including pressure transient tests, interference tests, DFITs, step-rate tests, and completion step-down tests.
• Independently review and interpret pressure, rate, and temperature data to assess reservoir properties, fracture behavior, and well performance.
• Evaluate crossflow behavior, injector–producer connectivity, and reservoir compartmentalization to inform development strategy.
• Provide guidance on lateral rate distribution and zonal performance diagnostics (e.g., PLT/DTS/DAS, tracer programs).
• Review completion step-down tests, injection/falloff programs, and stimulation diagnostics to assess near-wellbore and fracture performance.
• Support resource assessment work teams in prospect screening, reservoir characterization, and early-stage risk assessment.
• Provide input on location selection and wellbore targeting based on structural, thermal, and permeability models.
• Define minimum viable data acquisition strategies to evaluate new prospects efficiently and reduce uncertainty.
• Deliver clear technical recommendations to asset teams to guide optimization, stimulation strategy, and injection management.
• Promote consistent diagnostic standards and interpretation methodologies across projects.
• Partner with D&C to refine stage design, cluster efficiency, and stimulation strategy based on observed performance.
• Integrate diagnostic findings into reservoir models and development plans.

Cross-Functional Reservoir Development Support

• Support technical evaluation of geothermal leases from initial screening through completions readiness.
• Incorporate risk assessment, uncertainty analysis, contingency planning, and stage-gate decision logic into development program design.
• Work closely with earth science, drilling, completions, reservoir engineering, land, permitting, environmental, development, and HSE teams during exploration campaign.
• Utilize geomechanics and permeability indicators relevant to geothermal reservoir performance and EGS stimulation design.
• Provide technical recommendations related to logging programs, casing points, coring, well trajectories, and other geologic…