Bloomberg Businessweek Sage Geosystems CEO on the Promise of Geothermal Energy
Feb 12, 2026
Cindy Taff, CEO of Sage Geosystems and former oil and gas subsurface and drilling executive, explains pressure-based geothermal tech. She discusses turning hot, dry rock into energy reservoirs. Conversation covers partnerships, scale potential across the US, policy momentum, costs and timelines, seismic risk management, and water recycling strategies.
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Hot Dry Rock Unlocks Vast Geothermal Potential
- Next-generation geothermal taps hot, dry rock rather than rare hot-water pockets under volcanoes.
- That expands accessible geothermal from ~2% to roughly 50–60% of global resource potential.
Oil-and-Gas Expertise Seeded Sage Geosystems
- Cindy Taff and co-founders brought oil-and-gas subsurface expertise to found Sage about five years ago.
- Co-founders Levering and Lance Cook contributed scientific innovations adapted from oil-and-gas technologies.
Use Virtual PPAs For Flexible Corporate Supply
- Use virtual power purchase agreements (vPPAs) to supply corporate data centers without building on-site.
- Build plants near grid points to give location flexibility while matching customer demand like Meta's term sheet with Sage.