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Justin Spencer

Project Director 


Mr. Spencer is a registered Professional Engineer in Colorado with over 15 years of energy consulting experience. Mr. Spencer’s work has focused on distributed energy resource evaluation, baseline, and potential studies for utilities across North America. Mr. Spencer is a national expert in sampling, residential HVAC and heat pumps, and energy impact load shapes. Mr. Spencer is a coauthor of the Uniform Methods Project Chapter on Peak Demand and Time-Differentiated Energy Savings.

Previous to working at Apex Analytics, Mr. Spencer worked at Summit Blue, Navigant, and Guidehouse for 13 years, managing large portfolio impact evaluations and groundbreaking energy load shape studies. Mr. Spencer’s work has also included designing usage and savings studies using advanced sampling techniques, cost-effectiveness testing, measure screening, calibrated building simulation, baseline studies, and forward capacity market evaluation planning and reporting. Mr. Spencer has authored or coauthored dozens of papers and presentations over the last 15 years and served on technical review committees for multiple national efforts. Prior to Summit Blue, Mr. Spencer worked in the 

building technology and HVAC group at TIAX and interned in residential buildings group at NREL.

Mr. Spencer received a Bachelor of Science in Mechanical Engineering and Certificate of Environmental Science from Princeton University, as well as a Master of Science from the Building Systems Program at the University of Colorado. Mr. Spencer’s Master’s Thesis compared building simulation engines for use in residential energy optimization. While he was a student at CU, Mr. Spencer’s Solar Decathlon team developed a novel HVAC and thermal storage system for integration with distributed and grid-based renewables.

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