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Sarah Widder

As principal, Sarah leads Cadeo’s Emerging Technology team. She leverages her deep technical knowledge, understanding of market dynamics, and extraordinary communication skills to ensure deliverables are both robust and pragmatic. She works closely with clients to understand the technical and market barriers they face. Then, she designs research and programmatic solutions to help them overcome challenges and transform markets. Sarah’s broad base of experience in evaluating and implementing energy efficiency and resource conservation measures in every market sector includes regulatory development, lab scale R&D efforts, and large-scale field demonstration projects. This perspective, spanning from lab to field to market, guides Cadeo’s work in evaluating new energy efficiency technologies. Sarah works closely with manufacturers to develop new test procedures and rating metrics that better capture and promote energy-efficient designs. She also works to develop resources to support successful program implementation.

Sarah has a B.S. in Chemical Engineering from the University of Washington and a Ph.D. in Civil Engineering from Washington State University. In her spare time, Sarah is probably training or racing triathlon (in the summer) and cross-country skiing (in the winter). She also enjoys backpacking, gardening, harvesting wild plants, and pretty much anything that involves being outside.


  • Whole Building and Equipment Performance Evaluation
  • Test Procedure and Metric Development
  • Large-scale Data Analysis
  • Report and Standard Writing
  • Identifying and Resolving Market Barriers to Technology Performance and Adoption