PNNL

Carmen Cejudo is a Senior Researcher at Pacific Northwest National Laboratory (PNNL) specializing in water and energy efficiency in buildings. Her work supports federal agencies—including the Department of Energy, Department of War, U.S. Army Reserve, and the Federal Energy Management Program—in strengthening the resilience, efficiency, and performance of building water systems through efforts such as metering, water‑use analysis, and development of robust water‑efficiency guidance.

In addition, contributes extensively to DOE’s Building Energy Codes Program through active participation in ASHRAE and IECC code development. As a former consulting Mechanical Engineer and Past President of the ASHRAE Puget Sound Chapter, Carmen brings a blend of research, field experience, and industry leadership to improving building performance nationwide.

• Energy Water Nexus
• Water Conservation
• Heat Pump Water Heaters
• Water Microgrid
• Energy Efficiency
• Energy Codes
• Water Reuse
• Alternative Water

• BS Environmental Engineering, University of Southern California
• Mechanical Professional Engineer (PE), Washington State
• Mechanical Professional Engineer (PE), Oregon State
• LEED Accredited Professional (LEED AP BD+C), USGBC
• Building Commissioning Practitioner (BCxP), ASHRAE

• President Puget Sound Chapter 2018-2019; Member, ASHRAE, 2011 to Current
• Member, American Society of Plumbing Engineers (ASPE), 2012 to Current
• Member, International Association of Plumbing and Mechanical Officials (IAPMO), 2012 to Current
• Member, National Fire Protection Association (NFPA), 2016 to Current
• President Puget Sound Professionals Chapter 2010-2013; Member, Engineers Without Borders (EWB USA), 2008 to Current

2024

• Cejudo C. 2024. Scaling Up: Demonstrating Risk Reduction and Cost Compression for Commercial Heat Pump Water Heaters - CRADA 625 (Abstract). PNNL-35907. Richland, WA: Pacific Northwest National Laboratory. Scaling Up: Demonstrating Risk Reduction and Cost Compression for Commercial Heat Pump Water Heaters - CRADA 625 (Abstract)

2023

• Cejudo C., B.C. Pamintuan, A.M. Piazza, and S.A. Loper. 2023. Emerging Technologies Review: Water Microgrid. PNNL-34182. Richland, WA: Pacific Northwest National Laboratory. Emerging Technologies Review: Water Microgrid
• Cejudo C., B.C. Pamintuan, and K. Stoughton. 2023. Emerging Technologies Review: Water Reuse Systems for Cooling Tower Applications. PNNL-34788. Richland, WA: Pacific Northwest National Laboratory. Emerging Technologies Review: Water Reuse Systems for Cooling Tower Applications

2022

• Piazza A.M., C. Cejudo, and K. Stoughton. 2022. Technology Overview: Side Stream Filtration for Cooling Towers. PNNL-33324. Richland, WA: Pacific Northwest National Laboratory. Technology Overview: Side Stream Filtration for Cooling Towers

2021

• Hart R., J. McNeill, M.M. Tillou, C. Cejudo, C. Chandrasekharan Nambiar, H. Nagda, and D.E. Maddox, et al. 2021. Expanded Energy Credits in Energy Codes: Technical Brief. PNNL-31572. Richland, WA: Pacific Northwest National Laboratory. Expanded Energy Credits in Energy Codes: Technical Brief