Ry Horsey is a research engineer in the Building Stock Modeling and Analysis group at NREL. He values rigorous analysis and open collaboration, leading the conceptualization and growth of ComStock—the U.S. Department of Energy's high-resolution model of U.S. commercial-building energy use—since 2017. Utilities, regulators, and technology firms now employ ComStock to craft capital plans, test technology-deployment pathways, and reveal new demand-side value streams; tasks that once demanded months of bespoke work can now be completed in hours.

Horsey prioritizes repeatable, transparent software and data for decision-making. He helped develop the early development of the open-source Asset Score and SEED platforms, maintained the OpenStudio Analysis Framework, and rebuilt the OpenStudio Workflow Gem to bring cloud-scale analytics to thousands of practitioners. Beyond the lab, he has supported the Energy Ministry of Argentina on nationwide efficiency policy, delivered sub-hourly demand projections for the Los Angeles Department of Water and Power’s LA100 and follow on studies, guided industry partners in blending first-principles and machine-learning tools, and equipped the U.S. Department of Defense with base-level energy-planning models that bolster resilience and cut fuel dependence. His focus remains turning complex demand questions into actionable, open solutions.