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Sarah Widder

As Chief Services Officer, Sarah Widder leads Cadeo’s efforts to ensure our work is impactful for our clients and the industry. Leveraging her deep technical knowledge and strategic mindset, Sarah works to align Cadeo’s research efforts with the most important research questions facing our industry. She ensures Cadeo’s analytical approaches and research findings are both robust and pragmatic. She also supports internal processes that enable Cadeo staff to do their best work. 

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 and developing solutions for the technical and market barriers impeding market transformation of these new efficient and flexible energy technologies. Sarah also works closely with manufacturers to develop new test procedures and rating metrics. This work strives to better capture and promote energy-efficient designs as well as utility organizations to support successful program implementation. 

Prior to working at Cadeo, Sarah spent almost 9 years working at Pacific Northwest National Laboratory, primarily supporting DOE’s Appliance Standards and Building America programs. 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
  • Data Visualization and Interpretation
  • Strategic Roadmap Development
  • Report and Standard Writing
  • Identifying and Resolving Market Barriers to Technology Performance and Adoption