R&D Engineer

We are seeking a motivated R&D Engineer to support Darcy’s technology roadmap under the direction of our Chief Scientific Officer and cross-functional technical leadership. You’ll help accelerate the evolution of Darcy’s geothermal systems by developing new mechanical designs, tools and equipment, test methods, numerical models, and proof-of-concept field demonstrations.

This role blends structured research, modeling, prototyping, technical evaluation, and product development with collaboration among engineering, geology, and field operations teams — advancing innovation while translating ideas into scalable, real-world solutions.

• Bachelor’s degree (Master’s or PhD preferred) in Mechanical, Electrical, or Chemical Engineering;
  Materials Science;
  Energy Systems;
  Hydrogeology or Geothermal Geophysics; or a related discipline.
• 5+ years of hands-on R&D experience and track record of innovation in mechanical system design, engineering, physics, data analysis, prototype development, or related fields.
• Experience designing and testing mechanical components, tools, and/or products with a focus on performance metrics.
• Strong written and verbal communication skills; ability to document and present technical insights clearly.
• Highly organized, proactive in driving projects to completion, and comfortable working in a fast-paced, collaborative startup environment.
  Preferred
• Experience with geothermal systems, HVAC equipment, or other energy conversion technologies.
• Knowledge of building energy modeling software (Energy Plus).
• Experience with CAD software (Solid Work, Inventor) and data analysis environments (Python, MATLAB, etc.).
• Knowledge of research-grade, real-time data acquisition equipment (data loggers, sensors), software and analysis methods.
• Understanding of well drilling/installation practices.
• Demonstrated ability to manage R&D project workflows and dependencies across teams.

Technical R&D & Prototyping

• Execute research and numerical modeling to improve designs of Darcy’s geothermal system components, including heat exchangers, well instrumentation, and related components.
• Develop structured test plans, instrumentation strategies, and data capture procedures to validate design assumptions and performance targets.
• Build and test equipment prototypes, then collect and analyzing performance data.

Modeling & Analysis

• Support performance modeling and simulation efforts (thermal, fluid, mechanical) to inform design decisions and optimize system efficiency.
• Identify modeling and analytical gaps; propose new tools or methodologies to close them.
• Work with geoscience and engineering teams to integrate technical insights into broader product development.

Field Support & System Evaluation

• Collaborate with field installation teams to observe system operation, troubleshoot technical issues, and document insights for iterative improvement.
• Support system commissioning and data collection efforts.
• Contribute to field protocols that enhance reliability, repeatability, and safety.

Cross-Functional Collaboration

• Work closely with teams across disciplines to identify challenges and develop engineered solutions.
• Maintain clear documentation of research activities, test results, and technical recommendations.
• Prepare technical reports and presentations for internal teams and external partners.

• Ability to travel ~20% to investor meetings, project sites, capital partners, and industry events (regional, national, and international).
• Ability to sit for extended periods during modeling, analysis, and meetings.
• Standard office environment with hybrid work flexibility (3 days/week in office).
• Competitive compensation package, including bonus, full benefits, and eligibility for stock options.

Darcy Solutions was founded to improve the health of our communities and planet through practical climate solutions. Our proprietary geothermal technology leverages the thermal properties of groundwater to deliver all-electric heating and cooling for buildings, reducing energy costs while cutting carbon emissions in the built environment.

To apply, please submit your resume and a brief cover letter to Kathy Jennings , detailing your interest and how your skills and experience align with this role. If you require reasonable accommodation during the application or interview process, contact Kathy Jennings .